Traffic guidance screen control method, related device and storage medium

Abstract

The present disclosure provides a control method, related device and storage medium of a traffic guidance screen. The control method comprises: obtaining the signature encrypted data of the real-time traffic information to be displayed on the traffic guidance screen, wherein the real-time traffic information is determined according to the third-party information reported by the third-party platform and the road condition information reported by the vehicle system and / or the traveler system; decrypting and verifying the signature encrypted data of the real-time traffic information according to the data decryption and verification process to obtain the plain text data of the real-time traffic information; displaying the real-time traffic information on the traffic guidance screen, and broadcasting the real-time traffic information to the vehicle system and / or the traveler system, thereby improving the real-time and accuracy of the real-time traffic information displayed on the traffic guidance screen.

Description

Technical Field

[0001] The present invention belongs to the field of information security technology, and in particular relates to a control method, a related device and a storage medium for a traffic guidance screen. Background Art

[0002] Traffic guidance screens are an important vehicle-road cooperative technology device, mainly used to provide real-time traffic information, such as speed limits, traffic conditions and accident warnings, to help drivers make reasonable driving decisions. This type of equipment is usually installed on the roadside or at traffic hubs. The information it displays is intuitive, with a large amount of information and a short visual recognition time. It has a good guidance function for drivers who are not familiar with road conditions, and is particularly suitable for densely networked areas of urban roads and main highways. However, the information released by traffic guidance screens in related technologies is mostly static or updated regularly, which cannot reflect the actual traffic conditions in real time. For example, when a traffic accident or road construction occurs, the traffic guidance screens in related technologies may not be able to update relevant information in a timely manner, resulting in the driver being unable to obtain the latest road conditions, thereby affecting driving decisions. Summary of the invention

[0003] In view of the above problems, the present disclosure provides a control method, related devices and storage medium for a traffic guidance screen, aiming to improve the real-time and accuracy of the traffic guidance screen in displaying real-time traffic information.

[0004] According to a first aspect of the present disclosure, a method for controlling a traffic guidance screen is provided, the method comprising:

[0005] Obtaining the signed encrypted data of the real-time traffic information to be displayed on the traffic guidance screen, wherein the real-time traffic information is determined according to the third-party information reported by the third-party platform and the road condition information reported by the vehicle system and / or the traveler system;

[0006] Decrypt and verify the signature encrypted data of the real-time traffic information according to the data decryption and signature verification process to obtain the plaintext data of the real-time traffic information;

[0007] The real-time traffic information is displayed on the traffic guidance screen, and the real-time traffic information is broadcast to the vehicle-mounted system and / or the traveler system.

[0008] Optionally, the step of acquiring the signature encrypted data of the real-time traffic information to be displayed on the traffic guidance screen includes:

[0009] Receiving, on the cloud control platform, third-party information reported by the third-party platform;

[0010] Receiving, on the cloud control platform, road condition information reported by the vehicle system and / or the traveler system;

[0011] The cloud control platform sends the road condition information reported by the vehicle system and / or the traveler system to the third-party platform, so that the third-party platform can determine the third-party information that needs to be reported according to the road condition information;

[0012] Using artificial intelligence technology on the cloud control platform, the third-party information and the road condition information are analyzed and processed in real time to obtain the real-time traffic information;

[0013] Signing and encrypting the real-time traffic information according to the data signature encryption process on the cloud control platform to obtain signature encrypted data of the real-time traffic information;

[0014] The cloud control platform sends the signed encrypted data of the real-time traffic information to the traffic guidance screen.

[0015] Optionally, the receiving, on the cloud control platform, the road condition information reported by the vehicle system and / or the traveler system includes:

[0016] Collecting the reported information from the vehicle system and / or the traveler system;

[0017] Generating plain text data of the road condition information reported by the vehicle-mounted system and / or the traveler system according to the reported information of the vehicle-mounted system and / or the traveler system;

[0018] Sign and encrypt the plaintext data of the road condition information reported by the vehicle-mounted system and / or the traveler system according to the data signature encryption process to generate signature encrypted data of the road condition information reported by the vehicle-mounted system and / or the traveler system;

[0019] Sending the signed encrypted data of the road condition information reported by the vehicle system and / or the traveler system to the cloud control platform;

[0020] Among them, the cloud control platform decrypts and verifies the signature encrypted data of the road condition information reported by the vehicle system and / or the traveler system according to the data decryption and verification process to obtain the plaintext data of the road condition information reported by the vehicle system and / or the traveler system.

[0021] Optionally, displaying the real-time traffic information on the traffic guidance screen and broadcasting the real-time traffic information to the vehicle-mounted system and / or the traveler system includes:

[0022] generating first broadcast data according to the real-time traffic information;

[0023] Signing the first broadcast data according to a data signature process to obtain a digital signature of the first broadcast data;

[0024] broadcasting the first broadcast data and the digital signature of the first broadcast data to the in-vehicle system and / or the traveler system;

[0025] The in-vehicle system and / or the traveler system verifies the digital signature of the first broadcast data according to the data verification process, and notifies the vehicle owner and / or the traveler of the first broadcast data if the verification passes.

[0026] Optionally, the collecting of the reported information from the vehicle-mounted system and / or the traveler system includes:

[0027] generating second broadcast data in the vehicle-mounted system and / or the traveler system according to the reported information of the vehicle-mounted system and / or the traveler system;

[0028] Signing and encrypting the second broadcast data in the vehicle-mounted system and / or the traveler system according to a data signature encryption process to obtain signature encrypted data of the second broadcast data;

[0029] Broadcasting the signed encrypted data of the second broadcast data to the traffic guidance screen in the vehicle-mounted system and / or the traveler system;

[0030] Wherein, the signature encrypted data of the second broadcast data is decrypted and verified on the traffic guidance screen according to the data decryption and verification process to obtain the plaintext data of the second broadcast data.

[0031] Optionally, before acquiring the signature encrypted data of the real-time traffic information to be displayed on the traffic guidance screen, the control method further includes:

[0032] The Internet of Vehicles device sends a certificate application request to the digital identity service platform, wherein the certificate application request includes device information of the Internet of Vehicles device, and the Internet of Vehicles device includes any one of the cloud control platform, the traffic guidance screen, the vehicle-mounted system, and the traveler system;

[0033] When the digital identity service platform verifies that the certificate application request is legitimate, generating a digital certificate for the connected vehicle device, sending the digital certificate to the third-party platform, and issuing the digital certificate to the connected vehicle device;

[0034] The digital certificate is stored in a secure carrier in the Internet of Vehicles device.

[0035] Optionally, the data signing process includes:

[0036] The data sender uses the private key of the digital certificate of the data sender to sign the plaintext data of the data to be sent, so as to obtain the digital signature of the plaintext data of the data to be sent;

[0037] The data sender packages the plain text data of the data to be sent, the digital signature and the digital certificate of the data sender into a data packet;

[0038] The data verification process includes:

[0039] Verify at the data receiving party whether the digital certificate of the data sending party is legitimate;

[0040] If the digital certificate of the data sender is legal, checking at the data receiver whether the digital certificate has been revoked;

[0041] When the digital certificate of the data sender is within the validity period, the data receiver uses the public key of the digital certificate of the data sender to verify the digital signature of the plaintext data of the data to be sent. If the verification passes, the plaintext data of the data to be sent is obtained.

[0042] Optionally, the data signature encryption process includes:

[0043] The data sender uses the private key of the digital certificate of the data sender to sign the plaintext data of the data to be sent, so as to obtain the digital signature of the plaintext data of the data to be sent;

[0044] The data sender packages the plaintext data of the data to be sent, the digital signature and the digital certificate of the data sender into a first data packet;

[0045] The data sender encrypts the first data packet using a temporary encryption key to obtain ciphertext data of the first data packet;

[0046] The data sender uses the public key of the digital certificate of the receiver to encrypt the temporary encryption key to obtain the ciphertext data of the temporary encryption key;

[0047] The data sender packages the ciphertext data of the first data packet and the ciphertext data of the temporary encryption key into a second data packet;

[0048] The data decryption and signature verification process includes:

[0049] The data receiver uses the private key of the receiver's digital certificate to decrypt the ciphertext data of the temporary encryption key to obtain the plaintext data of the temporary encryption key;

[0050] Decrypting the ciphertext data of the first data packet using the plaintext data of the temporary encryption key at the data receiving party to obtain the plaintext data of the first data packet;

[0051] Verifying at the data receiving party whether the digital certificate of the data sending party is legitimate;

[0052] If the digital certificate of the data sender is legal, checking at the data receiver whether the digital certificate has been revoked;

[0053] When the digital certificate of the data sender is within the validity period, the data receiver uses the public key of the digital certificate of the data sender to verify the digital signature of the plaintext data of the data to be sent. If the verification passes, the plaintext data of the data to be sent is obtained.

[0054] According to a second aspect of the present disclosure, a control device for a traffic guidance screen is provided, the control device comprising:

[0055] A real-time traffic information acquisition unit, used to acquire the signature encrypted data of the real-time traffic information to be displayed on the traffic guidance screen, wherein the real-time traffic information is determined according to the third-party information reported by the third-party platform and the road condition information reported by the vehicle system and / or the traveler system;

[0056] A decryption and signature verification unit, configured to decrypt and verify the signature encrypted data of the real-time traffic information according to a data decryption and signature verification process to obtain the plaintext data of the real-time traffic information;

[0057] A display and broadcast unit is used for displaying the real-time traffic information on the traffic guidance screen and broadcasting the real-time traffic information to the vehicle-mounted system and / or the traveler system.

[0058] According to a third aspect of the present disclosure, a traffic guidance screen is provided, comprising

[0059] A display screen for displaying real-time traffic information;

[0060] The above-mentioned control device implements the steps of the above-mentioned method, controls the display of real-time traffic information on the display screen, and broadcasts the real-time traffic information to the vehicle system and / or the traveler system.

[0061] According to a fourth aspect of the present disclosure, a control system for a traffic guidance screen is provided, comprising:

[0062] A traffic guidance screen, comprising the above-mentioned control device, implements the steps of the above-mentioned method, controls the display of real-time traffic information on the traffic guidance screen, and broadcasts the real-time traffic information to the vehicle-mounted system and / or the traveler system;

[0063] The vehicle-mounted system is arranged on the vehicle passing by, and is used to communicate with the traffic guidance screen and other roadside units to realize vehicle-road cooperative communication between the vehicle and the roadside infrastructure;

[0064] The traveler system is provided on the intelligent terminal of the traveler passing by, and is used to communicate with the traffic guidance screen and other roadside units to realize vehicle-road cooperative communication between the intelligent terminal and the roadside infrastructure;

[0065] A cloud control platform, used for providing a safety management function for the vehicle-road cooperative communication between the traffic guidance screen and the vehicle-mounted system and / or the traveler system;

[0066] Third-party platform, used for reporting third-party information.

[0067] According to a fifth aspect of the present disclosure, an electronic device is provided, comprising: a processor, a memory, and a program stored in the memory and executable on the processor, wherein the program implements the steps of the method described above when executed by the processor.

[0068] According to a sixth aspect of the present disclosure, a storage medium is provided, on which a computer program or instruction is stored, and the computer program or instruction, when executed by a processor, implements the steps of the method described above.

[0069] The present disclosure brings the following beneficial effects:

[0070] The control method provided by the present disclosure is applied to a traffic guidance screen to obtain the signature encrypted data of the real-time traffic information to be displayed on the traffic guidance screen, wherein the real-time traffic information is determined according to the third-party information reported by the third-party platform and the road condition information reported by the vehicle system and / or the traveler system, and the signature encrypted data of the real-time traffic information is decrypted and verified according to the data decryption and signature verification process to obtain the plaintext data of the real-time traffic information, and the real-time traffic information is displayed on the traffic guidance screen, and the real-time traffic information is broadcast to the vehicle system and / or the traveler system. In this way, the road condition information reported by the vehicle system and / or the traveler system and the third-party platform can be collected based on the vehicle-road cooperative communication network. The reported third-party information (for example, weather, road conditions, etc.) is used to perform road analysis using big data analysis technology to obtain real-time traffic information to be displayed on the traffic guidance screen, thereby improving the real-time and accuracy of real-time traffic information displayed on the traffic guidance screen. The real-time traffic information is broadcast to the vehicle system and / or traveler system on the traffic guidance screen, thereby improving the road perception ability of the vehicle system and / or traveler system and the accuracy of driving decisions. Through digital identity authentication and password protection technology, the signed encrypted data of the real-time traffic information to be displayed is transmitted between the traffic guidance screen and the cloud control platform, thereby improving the data security of real-time traffic information displayed on the traffic guidance screen.

[0071] Other features and advantages of the present disclosure will be described in the following description, and partly become apparent from the description, or understood by practicing the present disclosure. The purpose and other advantages of the present disclosure are realized and obtained by the structures particularly pointed out in the description and the drawings.

[0072] In order to make the above-mentioned objectives, features and advantages of the present disclosure more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0073] The above and other objects, features and advantages of the present disclosure will become more apparent through the following description of the embodiments of the present disclosure with reference to the accompanying drawings, in which:

[0074] Figure 1 A schematic diagram of the structure of a control system of a traffic guidance screen provided according to an embodiment of the present disclosure;

[0075] Figure 2 A schematic flow chart of a method for controlling a traffic guidance screen according to an embodiment of the present disclosure;

[0076] Figure 3A A schematic diagram of a process for registering a digital certificate of a connected vehicle device according to an embodiment of the present disclosure;

[0077] Figure 3B A schematic diagram of a process for canceling a digital certificate of an Internet of Vehicles device according to an embodiment of the present disclosure;

[0078] Figure 4 A schematic diagram of a process of data signing and data verification according to an embodiment of the present disclosure;

[0079] Figure 5 A schematic diagram of a process of data signature encryption and data decryption verification according to an embodiment of the present disclosure;

[0080] Figure 6 A schematic diagram of a process of obtaining signature encryption data of real-time traffic information to be displayed on a traffic guidance screen according to an embodiment of the present disclosure;

[0081] Figure 7 A schematic diagram of a process of receiving road condition information reported by a vehicle system and / or a traveler system on a cloud control platform according to an embodiment of the present disclosure;

[0082] Figure 8 A schematic diagram of a process for collecting reported information from an onboard system and / or a traveler system on a traffic guidance screen according to an embodiment of the present disclosure;

[0083] Fig. 9A schematic diagram of a flow chart of broadcasting real-time traffic information to an onboard system and / or a traveler system on a traffic guidance screen according to an embodiment of the present disclosure;

[0084] Fig.10 A schematic diagram of the structure of a control device for a traffic guidance screen provided according to an embodiment of the present disclosure;

[0085] Fig.11 The present invention is a schematic diagram of the structure of an electronic device provided according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0086] Various embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. In each of the accompanying drawings, the same elements are represented by the same or similar reference numerals. For the sake of clarity, the various parts in the accompanying drawings are not drawn to scale.

[0087] The following terms are used in this article:

[0088] Digital signature is a technology based on public key encryption technology to verify the integrity of digital information and the identity of the sender. It is similar to the electronic form of a handwritten signature or seal, but more secure.

[0089] Onboard Unit (OBU) is an electronic device installed on a vehicle. Its main function is to communicate with roadside infrastructure (such as toll booths, traffic lights, traffic guidance screens, etc.) to realize information exchange between vehicles and roadside infrastructure in order to provide various traffic services. In the non-stop toll collection system, OBU can automatically identify the signals at the toll booth and automatically complete the transaction process, including deduction and collection. In the vehicle-road cooperative system, OBU can receive various traffic information sent by the roadside infrastructure (such as traffic light status, road conditions ahead, etc.) and display this information to the driver to help the driver make safer and more efficient driving decisions. At the same time, OBU can also send the vehicle's status information (such as location, speed, driving direction, etc.) to the roadside infrastructure for traffic management and services.

[0090] Road Side Unit (RSU) is an important wireless communication device in the vehicle-to-everything (V2X) system. It is installed on roadside infrastructure (such as traffic lights, traffic guidance screens, etc.). Its main function is to communicate with passing vehicles and other RSUs to achieve information exchange between vehicles and roadside infrastructure. RSU can collect and process various information about the vehicle, such as the vehicle's location, speed, direction, etc., and send this information to other vehicles or third-party platforms. At the same time, RSU can also receive information from third-party platforms, such as traffic conditions, weather information, etc., and pass this information to the vehicle to help the driver make better driving decisions.

[0091] The secure carrier includes a secure element (SE) and / or a TEE system. SE is an electronic component with tamper-proof function that can be installed on the terminal device to provide a secure and confidential data storage and operation environment. SE consists of software and tamper-proof hardware, supports high-level security, such as SIM cards, financial IC cards, smart SD cards, etc., and can run with TEE. SE includes a chip operating system (Chip Operating System, COS), a secure carrier application (Applet) and a memory to provide secure authentication, encryption and data protection functions.

[0092] Figure 1 FIG. 1 is a schematic diagram of a control system of a traffic guidance screen according to an embodiment of the present disclosure. Figure 1 As shown, the control system 100 provided in the embodiment of the present disclosure includes: an on-board system 110, a traffic guidance screen 120, a cloud control platform 130, a traveler system 140, a third-party platform 150 and a digital identity service platform 160. The on-board system 110 includes an on-board unit 111. The traffic guidance screen 120 includes a roadside unit 121 and a control device 122.

[0093] In some embodiments, the traffic guidance screen 120 is a roadside infrastructure. In modern transportation systems, vehicle-road cooperative technology is gradually playing an important role, among which the traffic guidance screen 120 is an important part of this technology. The traffic guidance screen 120 is usually used in densely populated sections of urban roads and main highways to display various traffic information in real time, including but not limited to speed limits, traffic conditions, accident warnings, etc., to help drivers make more reasonable driving decisions. The traffic guidance screen 120 is mainly composed of a display screen, a drive system, a roadside unit 121, a control device 122, a power supply system, a gantry and a box. These components work together to ensure that the traffic guidance screen 120 can accurately and timely display the required traffic information. In some embodiments, the roadside unit 121 communicates with passing vehicles and other roadside units to achieve vehicle-road cooperative communication between vehicles and roadside infrastructure.

[0094] In some embodiments, the vehicle-mounted system 110 is provided on the vehicle passing by, and is used to communicate with the traffic guidance screen 120 and other roadside units to realize the vehicle-road cooperative communication between the vehicle and the roadside infrastructure. In some embodiments, the traveler system 140 is provided on the smart terminal of the traveler passing by, and is used to communicate with the traffic guidance screen 120 and other roadside units to realize the vehicle-road cooperative communication between the smart terminal and the roadside infrastructure. In some embodiments, the cloud control platform 130 provides a security management function for the vehicle-road cooperative communication between the vehicle-mounted system 110, the traveler system 140 and the traffic guidance screen 120. In some embodiments, the third-party platform 150 is used to report third-party information. For example, if the third-party platform is a map APP, it reports user location information, navigation routes, traffic conditions, location search history, user behavior data, etc. For example, if the third-party platform is a weather APP, it reports the user's city, weather conditions, temperature and humidity, future weather forecasts, disaster warning information, etc. It should be noted that the third-party platform can also be other APPs related to road driving. In some embodiments, the digital identity service platform 160 is used to verify the real identity of the vehicle, which can usually be achieved by requiring the user to provide some real-name information (such as the vehicle's unique identifier). The digital identity service platform 160 is also called a certificate authority (CA), which is a core component of the PKI system and is responsible for issuing, managing, revoking and updating digital certificates, and will authenticate the entity that applies for the digital certificate.

[0095] In some embodiments, the control device 122 controls the display of real-time traffic information on the traffic guidance screen 120 according to the control method of the embodiment of the present disclosure, and broadcasts the real-time traffic information to the vehicle system 110 and / or the traveler system 140. Since the specific process of controlling the display of real-time traffic information on the traffic guidance screen 120 and broadcasting the real-time traffic information to the vehicle system 110 and / or the traveler system 140 using the control method of the embodiment of the present disclosure will be described in detail below, it will not be repeated here.

[0096] Figure 2 1 is a flow chart of a control method of a traffic guidance screen according to an embodiment of the present disclosure. The control method in the embodiment of the present disclosure is applied to the traffic guidance screen 120 and executed by the control device 122. Figure 2 As shown, the control method includes:

[0097] In step S210, the signature encrypted data of the real-time traffic information to be displayed on the traffic guidance screen is obtained, wherein the real-time traffic information is determined based on the third-party information reported by the third-party platform and the road condition information reported by the vehicle system and / or the traveler system.

[0098] In some embodiments, when the vehicle travels within a certain range from the traffic guidance screen 120, the vehicle-mounted unit 111 located in the vehicle-mounted system 110 and the roadside unit 121 located in the traffic guidance screen 120 can perform near field communication (for example, PC5 communication mode). In some embodiments, before step S210, the digital identity service platform 160 can issue a digital certificate to the Internet of Vehicles device. Figure 3A The flowchart of registering a digital certificate of a connected vehicle device according to an embodiment of the present disclosure is shown in FIG. In some embodiments, the connected vehicle device includes any one of a cloud control platform 130, a traffic guidance screen 120, an in-vehicle system 110, and a traveler system 140. The steps of registering a digital certificate of a connected vehicle device in the embodiment of the present disclosure include:

[0099] In step S311 , the Internet of Vehicles device sends a certificate application request to the digital identity service platform 160 , and the certificate application request includes device information of the Internet of Vehicles device.

[0100] In step S312, if the digital identity service platform 160 verifies that the certificate application request is legitimate, a digital certificate for the connected vehicle device is generated. If the digital identity service platform 160 verifies that the certificate application request is not legitimate, the process ends.

[0101] In step S313, the digital identity service platform 160 sends the digital certificate to the third-party platform 150. In step S314, the digital identity service platform 160 sends the digital certificate to the Internet of Vehicles device.

[0102] In step S315, the Internet of Vehicles device stores the digital certificate in a secure carrier (the secure carrier may be one of SE, TEE or SE+TEE), so that the digital certificate of the Internet of Vehicles device can be used in the business.

[0103] In some embodiments, the digital certificate of the Internet of Vehicles device may be revoked by the digital identity service platform 160 . Figure 3B The flowchart of canceling the digital certificate of a connected vehicle device according to an embodiment of the present disclosure is provided. In some embodiments, the connected vehicle device includes any one of the cloud control platform 130, the traffic guidance screen 120, the vehicle system 110, and the traveler system 140. The steps of canceling the digital certificate of the connected vehicle device in the embodiment of the present disclosure include:

[0104] In step S321, the digital identity service platform 160 signs the certificate revocation list according to the data signature process to obtain the digital signature of the certificate revocation list. Figure 4 The following is a flow chart of data signing and data verification according to an embodiment of the present disclosure. Figure 4 The data sender in is the digital identity service platform 160, the data receiver is the Internet of Vehicles device, and the data to be sent is the certificate revocation list. Figure 4 As shown, the steps of signing the certificate revocation list on the digital identity service platform 160 in the embodiment of the present disclosure include:

[0105] In step S410, the digital identity service platform 160 uses the private key of the digital certificate of the digital identity service platform 160 to sign the plain text data of the certificate revocation list to obtain the digital signature of the plain text data of the certificate revocation list.

[0106] In step S420 , the digital identity service platform 160 packages the plain text data of the certificate revocation list, the digital signature, and the digital certificate of the digital identity service platform 160 into a data packet.

[0107] In step S322 , the Internet of Vehicles device sends a certificate revocation list download request to the digital identity service platform 160 .

[0108] In step S323 , the Internet of Vehicles device receives the certificate revocation list and its digital signature issued by the digital identity service platform 160 .

[0109] In step S324, the Internet of Vehicles device verifies the digital signature of the certificate revocation list according to the data verification process, and stores the certificate revocation list in a secure carrier if the verification passes. When using the digital certificate of the Internet of Vehicles device, the certificate revocation list can be checked to confirm whether the certificate has been revoked. In some embodiments, Figure 4As shown, in the embodiment of the present disclosure, the steps of verifying the digital signature of the certificate revocation list in the Internet of Vehicles device include:

[0110] In step S430 , the Internet of Vehicles device verifies whether the digital certificate of the digital identity service platform 160 is legitimate.

[0111] In step S440, if the digital certificate of the digital identity service platform 160 is legal, the Internet of Vehicles device checks whether the digital certificate has been revoked. If the digital certificate of the digital identity service platform 160 is not legal, the process ends.

[0112] In step S450, if the digital certificate of the digital identity service platform 160 is within the validity period, the Internet of Vehicles device uses the public key of the digital certificate of the digital identity service platform 160 to verify the digital signature of the plain text data of the certificate revocation list. If the signature verification is successful, the plain text data of the certificate revocation list is obtained. If the digital certificate of the digital identity service platform 160 is not within the validity period, the process ends.

[0113] It should be noted that the vehicle-mounted unit 111 is the vehicle-road cooperative wireless communication device of the vehicle-mounted system 110. The communication between the vehicle-mounted system 110 and other connected vehicle devices is actually the communication between the vehicle-mounted unit 111 and other connected vehicle devices. The roadside unit 121 is the vehicle-road cooperative wireless communication device of the traffic guidance screen 120. The communication between the traffic guidance screen 120 and other connected vehicle devices is actually the communication between the roadside unit 121 and other connected vehicle devices. In some embodiments, the digital certificates of the traffic guidance screen 120, the vehicle-mounted system 110, and the traveler system 140 can be synchronized to the cloud control platform 130.

[0114] Figure 6 The present invention is a flow chart of obtaining the signature encryption data of the real-time traffic information to be displayed on the traffic guidance screen according to an embodiment of the present disclosure. Figure 6 As shown, in some embodiments, the step of obtaining the signature encrypted data of the real-time traffic information to be displayed on the traffic guidance screen 120 includes:

[0115] In step S610 , the cloud control platform 130 receives third-party information reported by the third-party platform 150 .

[0116] In step S620 , the cloud control platform 130 receives the road condition information reported by the vehicle system 110 and / or the traveler system 140 . Figure 7 The following is a flow chart of receiving road condition information reported by a vehicle system and / or a traveler system on a cloud control platform according to an embodiment of the present disclosure. Figure 7As shown, in the embodiment of the present disclosure, the steps of receiving the road condition information reported by the vehicle system 110 and / or the traveler system 140 on the cloud control platform 130 include:

[0117] In step S710 , the traffic guidance screen 120 collects the reporting information of the vehicle system 110 and / or the traveler system 140 . Figure 8 The following is a flow chart of collecting information reported by the vehicle system and / or the traveler system on the traffic guidance screen according to an embodiment of the present disclosure. Figure 8 As shown, in some embodiments, the step of collecting the reported information of the vehicle system 110 and / or the traveler system 140 on the traffic guidance screen 120 includes:

[0118] In step S810 , the in-vehicle system 110 and / or the traveler system 140 generates second broadcast data according to the reporting information of the in-vehicle system 110 and / or the traveler system 140 .

[0119] In step S820, the in-vehicle system 110 and / or the traveler system 140 signs and encrypts the second broadcast data according to the data signature encryption process to obtain signature encrypted data of the second broadcast data. Figure 5 The following is a flow chart of data signature encryption and data decryption verification according to an embodiment of the present disclosure. Figure 5 The data sender is the vehicle system 110 and / or the traveler system 140, the data receiver is the traffic guidance screen 120, and the data to be sent is the second broadcast data. Figure 5 As shown, in the embodiment of the present disclosure, the steps of signing and encrypting the second broadcast data in the vehicle system 110 and / or the traveler system 140 include:

[0120] In step S501, the vehicle system 110 and / or the traveler system 140 signs the plaintext data of the second broadcast data using the private key of the digital certificate of the vehicle system 110 and / or the traveler system 140 to obtain the digital signature of the plaintext data of the second broadcast data.

[0121] In step S502 , the vehicle-mounted system 110 and / or the traveler system 140 packages the plain text data of the second broadcast data, the digital signature, and the digital certificate of the vehicle-mounted system 110 and / or the traveler system 140 into a first data packet.

[0122] In step S503, the in-vehicle system 110 and / or the traveler system 140 encrypts the first data packet using a temporary encryption key to obtain ciphertext data of the first data packet.

[0123] In step S504, the in-vehicle system 110 and / or the traveler system 140 uses the public key of the digital certificate of the traffic guidance screen 120 to encrypt the temporary encryption key to obtain ciphertext data of the temporary encryption key.

[0124] In step S505 , the vehicle system 110 and / or the traveler system 140 packages the ciphertext data of the first data packet and the ciphertext data of the temporary encryption key into a second data packet.

[0125] In step S830, the vehicle-mounted system 110 and / or the traveler system 140 broadcasts the signed encrypted data of the second broadcast data to the traffic guidance screen 120, so that the traffic guidance screen 120 can decrypt and verify the signed encrypted data of the second broadcast data according to the data decryption and verification process to obtain the plaintext data of the second broadcast data (that is, the reported information of the vehicle-mounted system 110 and / or the traveler system 140 is collected by the traffic guidance screen 120).

[0126] In some embodiments, the signature encrypted data of the second broadcast data includes the plaintext data of the second broadcast data, the digital signature and the ciphertext data of the first data packet packaged into the digital certificate of the vehicle system 110 and / or the traveler system 140, and the ciphertext data of the temporary encryption key. Figure 5 As shown, in the embodiment of the present disclosure, the steps of decrypting and verifying the signature encrypted data of the second broadcast data on the traffic guidance screen 120 include:

[0127] In step S506, the traffic guidance screen 120 uses the private key of the digital certificate of the traffic guidance screen 120 to decrypt the ciphertext data of the temporary encryption key to obtain the plaintext data of the temporary encryption key.

[0128] In step S507, the traffic guidance screen 120 uses the plaintext data of the temporary encryption key to decrypt the ciphertext data of the first data packet to obtain the plaintext data of the first data packet.

[0129] In step S508 , the traffic guidance screen 120 verifies whether the digital certificates of the vehicle system 110 and / or the traveler system 140 are legitimate.

[0130] In step S509, if the digital certificate of the vehicle system 110 and / or the traveler system 140 is legal, the traffic guidance screen 120 checks whether the digital certificate has been revoked. If the digital certificate of the vehicle system 110 and / or the traveler system 140 is not legal, the process ends.

[0131] In step S510, if the digital certificate of the vehicle-mounted system 110 and / or the traveler system 140 is within the validity period, the digital signature of the plain text data of the second broadcast data is verified using the public key of the digital certificate of the vehicle-mounted system 110 and / or the traveler system 140 on the traffic guidance screen 120. If the verification is successful, the plain text data of the second broadcast data is obtained. If the digital certificate of the vehicle-mounted system 110 and / or the traveler system 140 is not within the validity period, the process ends.

[0132] In step S720 , the traffic guidance screen 120 generates plain text data of the road condition information reported by the vehicle system 110 and / or the traveler system 140 based on the reported information of the vehicle system 110 and / or the traveler system 140 .

[0133] In step S730, the traffic guidance screen 120 performs signature encryption on the plain text data of the road condition information reported by the vehicle system 110 and / or the traveler system 140 according to the data signature encryption process to generate signature encrypted data of the road condition information reported by the vehicle system 110 and / or the traveler system 140. In some embodiments, Figure 5 The data sender in the example is the traffic guidance screen 120, the data receiver is the cloud control platform 130, and the data to be sent is the plain text data of the road condition information reported by the vehicle system 110 and / or the traveler system 140. Figure 5 As shown, in the embodiment of the present disclosure, the steps of signing and encrypting the plain text data of the road condition information reported by the vehicle system 110 and / or the traveler system 140 on the traffic guidance screen 120 include:

[0134] In step S501, the traffic guidance screen 120 uses the private key of the digital certificate of the traffic guidance screen 120 to sign the plaintext data of the road condition information reported by the vehicle system 110 and / or the traveler system 140, and obtains the digital signature of the plaintext data of the road condition information reported by the vehicle system 110 and / or the traveler system 140.

[0135] In step S502 , the traffic guidance screen 120 packages the plain text data of the road condition information reported by the vehicle system 110 and / or the traveler system 140 , the digital signature, and the digital certificate of the traffic guidance screen 120 into a first data packet.

[0136] In step S503, the first data packet is encrypted using a temporary encryption key on the traffic guidance screen 120 to obtain ciphertext data of the first data packet.

[0137] In step S504, the temporary encryption key is encrypted using the public key of the digital certificate of the cloud control platform 130 on the traffic guidance screen 120 to obtain ciphertext data of the temporary encryption key.

[0138] In step S505 , the ciphertext data of the first data packet and the ciphertext data of the temporary encryption key are packaged into a second data packet on the traffic guidance screen 120 .

[0139] In step S740, the signature encrypted data of the road condition information reported by the vehicle system 110 and / or the traveler system 140 is sent to the cloud control platform 130, so that the signature encrypted data of the road condition information reported by the vehicle system 110 and / or the traveler system 140 is decrypted and verified on the cloud control platform 130 according to the data decryption and verification process to obtain the plaintext data of the road condition information reported by the vehicle system 110 and / or the traveler system 140.

[0140] In some embodiments, the signed encrypted data of the traffic information reported by the vehicle system 110 and / or the traveler system 140 includes the plain text data of the traffic information reported by the vehicle system 110 and / or the traveler system 140, the ciphertext data of the first data packet packaged with the digital signature and the digital certificate of the traffic guidance screen 120, and the ciphertext data of the temporary encryption key. Figure 5 As shown, in the embodiment of the present disclosure, the steps of decrypting and verifying the signature encrypted data of the road condition information reported by the vehicle system 110 and / or the traveler system 140 on the cloud control platform 130 include:

[0141] In step S506 , the cloud control platform 130 uses the private key of the digital certificate of the cloud control platform 130 to decrypt the ciphertext data of the temporary encryption key to obtain the plaintext data of the temporary encryption key.

[0142] In step S507, the cloud control platform 130 uses the plaintext data of the temporary encryption key to decrypt the ciphertext data of the first data packet to obtain the plaintext data of the first data packet.

[0143] In step S508 , the cloud control platform 130 verifies whether the digital certificate of the traffic guidance screen 120 is legitimate.

[0144] In step S509, if the digital certificate of the traffic guidance screen 120 is legal, the cloud control platform 130 checks whether the digital certificate has been revoked. If the digital certificate of the traffic guidance screen 120 is not legal, the process ends.

[0145] In step S510, if the digital certificate of the traffic guidance screen 120 is within the validity period, the cloud control platform 130 uses the public key of the digital certificate of the traffic guidance screen 120 to verify the digital signature of the plain text data of the road condition information reported by the vehicle system 110 and / or the traveler system 140. If the signature verification is successful, the plain text data of the road condition information reported by the vehicle system 110 and / or the traveler system 140 is obtained. If the digital certificate of the traffic guidance screen 120 is not within the validity period, the process ends.

[0146] In step S630, the cloud control platform 130 sends the road condition information reported by the vehicle system 110 and / or the traveler system 140 to the third-party platform 150, so that the third-party platform 150 can determine the third-party information that needs to be reported based on the road condition information.

[0147] In step S640, the cloud control platform 130 uses artificial intelligence technology to analyze and process the third-party information and road condition information in real time to obtain real-time traffic information.

[0148] In step S650, the cloud control platform 130 performs signature encryption on the real-time traffic information according to the data signature encryption process to obtain signature encrypted data of the real-time traffic information. Figure 5 The data sender is the cloud control platform 130, the data receiver is the traffic guidance screen 120, and the data to be sent is real-time traffic data. Figure 5 As shown, the steps of signing and encrypting the real-time traffic information on the cloud control platform 130 in the embodiment of the present disclosure include:

[0149] In step S501 , the cloud control platform 130 uses the private key of the digital certificate of the cloud control platform 130 to sign the real-time traffic information, thereby obtaining a digital signature of the real-time traffic information.

[0150] In step S502 , the cloud control platform 130 packages the plain text data of the real-time traffic information, the digital signature, and the digital certificate of the cloud control platform 130 into a first data packet.

[0151] In step S503, the cloud control platform 130 uses the temporary encryption key to encrypt the first data packet to obtain ciphertext data of the first data packet.

[0152] In step S504, the cloud control platform 130 uses the public key of the digital certificate of the traffic guidance screen 120 to encrypt the temporary encryption key to obtain ciphertext data of the temporary encryption key.

[0153] In step S505 , the cloud control platform 130 packages the ciphertext data of the first data packet and the ciphertext data of the temporary encryption key into a second data packet.

[0154] In step S660 , the cloud control platform 130 sends the signature encrypted data of the real-time traffic information to the traffic guidance screen 120 , so that the traffic guidance screen 120 obtains the signature encrypted data of the real-time traffic information to be displayed on the traffic guidance screen 120 .

[0155] In step S220, the signature encrypted data of the real-time traffic information is decrypted and verified according to the data decryption and verification process to obtain the plaintext data of the real-time traffic information.

[0156] In some embodiments, the signature encrypted data of the real-time traffic information includes the ciphertext data of the first data packet packaged with the real-time traffic information, its digital signature and the digital certificate of the cloud control platform 130, and the ciphertext data of the temporary encryption key. Figure 5 As shown, in the embodiment of the present disclosure, the steps of decrypting and verifying the signature encrypted data of the real-time traffic information on the traffic guidance screen 120 include:

[0157] In step S506, the traffic guidance screen 120 uses the private key of the digital certificate of the traffic guidance screen 120 to decrypt the ciphertext data of the temporary encryption key to obtain the plaintext data of the temporary encryption key.

[0158] In step S507, the traffic guidance screen 120 uses the plaintext data of the temporary encryption key to decrypt the ciphertext data of the first data packet to obtain the plaintext data of the first data packet.

[0159] In step S508 , the traffic guidance screen 120 verifies whether the digital certificate of the cloud control platform 130 is legitimate.

[0160] In step S509, if the digital certificate of the cloud control platform 130 is legal, the traffic guidance screen 120 checks whether the digital certificate has been revoked. If the digital certificate of the cloud control platform 130 is legal, the process ends.

[0161] In step S510, if the digital certificate of the cloud control platform 130 is within the validity period, the traffic guidance screen 120 uses the public key of the digital certificate of the cloud control platform 130 to verify the digital signature of the real-time traffic information. If the verification is successful, the plain text data of the real-time traffic information is obtained. If the digital certificate of the cloud control platform 130 is not within the validity period, the process ends.

[0162] In step S230, the real-time traffic information is displayed on the traffic guidance screen, and the real-time traffic information is broadcast to the vehicle-mounted system and / or the traveler system.

[0163] In some embodiments, real-time traffic information is displayed on the display screen of the traffic guidance screen 120 . Fig. 9 The present invention is a flowchart of broadcasting real-time traffic information to the vehicle system and / or the traveler system on the traffic guidance screen according to an embodiment of the present invention. Fig. 9 As shown, in some embodiments, the steps of broadcasting real-time traffic information to the vehicle system 110 and / or the traveler system 140 on the traffic guidance screen 120 in the embodiment of the present disclosure include:

[0164] In step S910 , the traffic guidance screen 120 generates first broadcast data according to real-time traffic information.

[0165] In step S920, the first broadcast data is signed according to the data signature process on the traffic guidance screen 120 to obtain a digital signature of the first broadcast data. Figure 4 The data sender is the traffic guidance screen 120, the data receiver is the vehicle system 110 and / or the traveler system 140, and the data to be sent is the first broadcast data. Figure 4 As shown, the step of signing the first broadcast data on the traffic guidance screen 120 in the embodiment of the present disclosure includes:

[0166] In step S410, the traffic guidance screen 120 signs the first broadcast data using the private key of the digital certificate of the traffic guidance screen 120 to obtain the digital signature of the first broadcast data.

[0167] In step S420 , the traffic guidance screen 120 packages the first broadcast data, its digital signature, and the digital certificate of the traffic guidance screen 120 into a data packet.

[0168] In step S930, the traffic guidance screen 120 broadcasts the first broadcast data and the digital signature of the first broadcast data to the vehicle system 110 and / or the traveler system 140. In some embodiments, the traffic guidance screen 120 broadcasts the first broadcast data, its digital signature and the digital certificate of the traffic guidance screen 120 into a data packet to the vehicle system 110 and / or the traveler system 140.

[0169] In step S940, the vehicle system 110 and / or the traveler system 140 verifies the digital signature of the first broadcast data according to the data verification process, and notifies the vehicle owner and / or the traveler of the first broadcast data if the verification passes. Figure 4 As shown, in the embodiment of the present disclosure, the step of verifying the digital signature of the first broadcast data in the vehicle system 110 and / or the traveler system 140 includes:

[0170] In step S430 , the in-vehicle system 110 and / or the traveler system 140 verifies whether the digital certificate of the traffic guidance screen 120 is legitimate.

[0171] In step S440, if the digital certificate of the traffic guidance screen 120 is legitimate, the vehicle system 110 and / or the traveler system 140 checks whether the digital certificate has been revoked. If the digital certificate of the traffic guidance screen 120 is not legitimate, the process ends.

[0172] In step S450, if the digital certificate of the traffic guidance screen 120 is within the validity period, the vehicle-mounted system 110 and / or the traveler system 140 uses the public key of the digital certificate of the traffic guidance screen 120 to verify the digital signature of the first broadcast data. If the verification is successful, the first broadcast data is notified to the vehicle owner and / or the traveler. If the digital certificate of the traffic guidance screen 120 is not within the validity period, the process ends.

[0173] It is understandable that the control method flow of the traffic guidance screen in the embodiment of the present disclosure can be executed regularly at a certain frequency. It is understandable that the traffic guidance screen 120 in the embodiment of the present disclosure is interconnected with the cloud control platform 130 and the vehicle system 110 and / or the traveler system 140 through the network, and can display road traffic information in real time and dynamically, without the need to use the local area network infrastructure constructed by Ethernet technology, thereby reducing infrastructure costs.

[0174] It should be noted that the data encryption and decryption in the disclosed embodiment is protected by digital envelope technology, and the algorithms related to signature encryption and decryption verification can be implemented by calling the algorithms in the security carrier. It is understandable that in the communication process between the cloud control platform 130 and the traffic guidance screen 120, the data signature encryption method is used to achieve the purpose of data integrity verification and identity authentication, thereby improving the security of data transmission. It is understandable that in the process of the vehicle-mounted system 110 and / or the traveler system 140 reporting information to the traffic guidance screen 120, the data signature encryption method is used to achieve the purpose of data integrity verification and identity authentication, thereby improving the security of data transmission. In the process of the traffic guidance screen 120 broadcasting real-time traffic data to the vehicle-mounted system 110 and / or the traveler system 140, the data signature method is used to achieve the purpose of data integrity verification and identity authentication. It should be noted that the temporary encryption key (which can be symmetric or asymmetric) used in the embodiment of the present disclosure is temporarily generated and protected by encrypting the temporary encryption key with the public key of the recipient's certificate, thereby improving the data security of communication between the cloud control platform 130, the vehicle system 110 and / or the traveler system 140 and the traffic guidance screen 120.

[0175] Fig.10 FIG. 1 is a schematic diagram of a control device for a traffic guidance screen according to an embodiment of the present disclosure. The control device 1000 may be located in the traffic guidance screen 120. Fig.10 As shown, the control device 1000 includes a real-time traffic information acquisition unit 1010 , a decryption and signature verification unit 1020 , and a display and broadcasting unit 1030 .

[0176] The real-time traffic information acquisition unit 1010 is used to obtain the signature encrypted data of the real-time traffic information to be displayed on the traffic guidance screen, wherein the real-time traffic information is determined based on the third-party information reported by the third-party platform and the road condition information reported by the vehicle system and / or the traveler system.

[0177] The decryption and signature verification unit 1020 is used to decrypt and verify the signature encrypted data of the real-time traffic information according to the data decryption and signature verification process to obtain the plaintext data of the real-time traffic information.

[0178] The display and broadcast unit 1030 is used to display the real-time traffic information on the traffic guidance screen and broadcast the real-time traffic information to the vehicle-mounted system and / or the traveler system.

[0179] Since the specific process of using the control method of the embodiment of the present disclosure to display real-time traffic information on the traffic guidance screen 120 and broadcasting the real-time traffic information to the vehicle system 110 and / or the traveler system has been described in detail above, it will not be repeated here.

[0180] The present disclosure also provides an electronic device, such as Fig.11 As shown, it includes a memory 1120, a processor 1110, and a program stored in the memory 1120 and executable on the processor 1110. When the program is executed by the processor 1110, each process of each embodiment of the above control method can be implemented, and the same technical effect can be achieved. To avoid repetition, it will not be described here.

[0181] Those skilled in the art can understand that all or part of the steps in the various methods of the above embodiments can be completed by instructions, or by controlling related hardware through instructions, and the instructions can be stored in a computer-readable storage medium and loaded and executed by a processor. To this end, the embodiments of the present disclosure also provide a storage medium, on which a computer program or instruction is stored, and when the computer program or instruction is executed by the processor, each process of each embodiment of the above control method can be implemented.

[0182] Since the instructions stored in the storage medium can execute the steps in the control method provided in the embodiment of the present disclosure, the beneficial effects that can be achieved by the control method provided in the embodiment of the present disclosure can be achieved. For details, please refer to the previous embodiment, which will not be repeated here. The specific implementation of each of the above operations can be referred to the previous embodiment, which will not be repeated here.

[0183] In summary, the control method provided by the present disclosure is applied to a traffic guidance screen to obtain the signature encrypted data of the real-time traffic information to be displayed on the traffic guidance screen, wherein the real-time traffic information is determined according to the third-party information reported by the third-party platform and the road condition information reported by the vehicle-mounted system and / or the traveler system, and the signature encrypted data of the real-time traffic information is decrypted and verified according to the data decryption and signature verification process to obtain the plaintext data of the real-time traffic information, and the real-time traffic information is displayed on the traffic guidance screen, and the real-time traffic information is broadcast to the vehicle-mounted system and / or the traveler system. In this way, the road condition information reported by the vehicle-mounted system and / or the traveler system and the third-party information can be collected based on the vehicle-road cooperative communication network. The third-party information reported by the platform (for example, weather, road conditions, etc.) is used to perform road analysis using big data analysis technology to obtain real-time traffic information to be displayed on the traffic guidance screen, thereby improving the real-time and accuracy of real-time traffic information displayed on the traffic guidance screen. The real-time traffic information is broadcast to the vehicle system and / or traveler system on the traffic guidance screen, thereby improving the road perception ability of the vehicle system and / or traveler system and the accuracy of driving decisions. Through digital identity authentication and password protection technology, the signed encrypted data of the real-time traffic information to be displayed is transmitted between the traffic guidance screen and the cloud control platform, thereby improving the data security of real-time traffic information displayed on the traffic guidance screen.

[0184] Finally, it should be noted that: Obviously, the above embodiments are only examples for clearly illustrating the present disclosure, and are not intended to limit the implementation methods. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from this are still within the scope of protection of the present disclosure.

Claims

1. A control method for a traffic guidance screen, the control method comprising: Obtaining the signed encrypted data of the real-time traffic information to be displayed on the traffic guidance screen, wherein the real-time traffic information is determined according to the third-party information reported by the third-party platform and the road condition information reported by the vehicle system and / or the traveler system; Decrypt and verify the signature encrypted data of the real-time traffic information according to the data decryption and signature verification process to obtain the plaintext data of the real-time traffic information; The real-time traffic information is displayed on the traffic guidance screen, and the real-time traffic information is broadcast to the vehicle-mounted system and / or the traveler system.

2. The control method according to claim 1, wherein: The method of obtaining the signature encrypted data of the real-time traffic information to be displayed on the traffic guidance screen includes: Receiving, on the cloud control platform, third-party information reported by the third-party platform; Receiving, on the cloud control platform, road condition information reported by the vehicle system and / or the traveler system; The cloud control platform sends the road condition information reported by the vehicle system and / or the traveler system to the third-party platform, so that the third-party platform can determine the third-party information that needs to be reported according to the road condition information; Using artificial intelligence technology on the cloud control platform, the third-party information and the road condition information are analyzed and processed in real time to obtain the real-time traffic information; Signing and encrypting the real-time traffic information according to the data signature encryption process on the cloud control platform to obtain signature encrypted data of the real-time traffic information; The cloud control platform sends the signed encrypted data of the real-time traffic information to the traffic guidance screen.

3. The control method according to claim 2, wherein: The receiving, on the cloud control platform, the road condition information reported by the vehicle system and / or the traveler system includes: Collecting the reported information from the vehicle system and / or the traveler system; Generating plain text data of the road condition information reported by the vehicle-mounted system and / or the traveler system according to the reported information of the vehicle-mounted system and / or the traveler system; Sign and encrypt the plaintext data of the road condition information reported by the vehicle-mounted system and / or the traveler system according to the data signature encryption process to generate signature encrypted data of the road condition information reported by the vehicle-mounted system and / or the traveler system; Sending the signed encrypted data of the road condition information reported by the vehicle system and / or the traveler system to the cloud control platform; Among them, the cloud control platform decrypts and verifies the signature encrypted data of the road condition information reported by the vehicle system and / or the traveler system according to the data decryption and verification process to obtain the plaintext data of the road condition information reported by the vehicle system and / or the traveler system.

4. The control method according to claim 3, wherein: The step of displaying the real-time traffic information on the traffic guidance screen and broadcasting the real-time traffic information to the vehicle-mounted system and / or the traveler system comprises: generating first broadcast data according to the real-time traffic information; Signing the first broadcast data according to a data signature process to obtain a digital signature of the first broadcast data; broadcasting the first broadcast data and the digital signature of the first broadcast data to the in-vehicle system and / or the traveler system; The in-vehicle system and / or the traveler system verifies the digital signature of the first broadcast data according to the data verification process, and notifies the vehicle owner and / or the traveler of the first broadcast data if the verification passes.

5. The control method according to claim 4, wherein: The collecting of the reported information from the vehicle-mounted system and / or the traveler system includes: generating second broadcast data in the vehicle-mounted system and / or the traveler system according to the reported information of the vehicle-mounted system and / or the traveler system; Signing and encrypting the second broadcast data in the vehicle-mounted system and / or the traveler system according to a data signature encryption process to obtain signature encrypted data of the second broadcast data; Broadcasting the signed encrypted data of the second broadcast data to the traffic guidance screen in the vehicle-mounted system and / or the traveler system; Wherein, the signature encrypted data of the second broadcast data is decrypted and verified on the traffic guidance screen according to the data decryption and verification process to obtain the plaintext data of the second broadcast data.

6. The control method according to claim 5, wherein: Before acquiring the signature encrypted data of the real-time traffic information to be displayed on the traffic guidance screen, the control method further includes: The Internet of Vehicles device sends a certificate application request to the digital identity service platform, wherein the certificate application request includes device information of the Internet of Vehicles device, and the Internet of Vehicles device includes any one of the cloud control platform, the traffic guidance screen, the vehicle-mounted system, and the traveler system; When the digital identity service platform verifies that the certificate application request is legitimate, generating a digital certificate for the connected vehicle device, sending the digital certificate to the third-party platform, and issuing the digital certificate to the connected vehicle device; The digital certificate is stored in a secure carrier in the Internet of Vehicles device.

7. The control method according to claim 6, wherein: The data signing process includes: The data sender uses the private key of the digital certificate of the data sender to sign the plaintext data of the data to be sent, so as to obtain the digital signature of the plaintext data of the data to be sent; The data sender packages the plain text data of the data to be sent, the digital signature and the digital certificate of the data sender into a data packet; The data verification process includes: Verify at the data receiving party whether the digital certificate of the data sending party is legitimate; If the digital certificate of the data sender is legal, checking at the data receiver whether the digital certificate has been revoked; When the digital certificate of the data sender is within the validity period, the data receiver uses the public key of the digital certificate of the data sender to verify the digital signature of the plaintext data of the data to be sent. If the verification passes, the plaintext data of the data to be sent is obtained.

8. The control method according to claim 5, wherein: The data signature encryption process includes: The data sender uses the private key of the digital certificate of the data sender to sign the plaintext data of the data to be sent, so as to obtain the digital signature of the plaintext data of the data to be sent; The data sender packages the plaintext data of the data to be sent, the digital signature and the digital certificate of the data sender into a first data packet; The data sender encrypts the first data packet using a temporary encryption key to obtain ciphertext data of the first data packet; The data sender uses the public key of the digital certificate of the receiver to encrypt the temporary encryption key to obtain the ciphertext data of the temporary encryption key; The data sender packages the ciphertext data of the first data packet and the ciphertext data of the temporary encryption key into a second data packet; The data decryption and signature verification process includes: The data receiver uses the private key of the receiver's digital certificate to decrypt the ciphertext data of the temporary encryption key to obtain the plaintext data of the temporary encryption key; Decrypting the ciphertext data of the first data packet using the plaintext data of the temporary encryption key at the data receiving party to obtain the plaintext data of the first data packet; Verifying at the data receiving party whether the digital certificate of the data sending party is legitimate; If the digital certificate of the data sender is legal, checking at the data receiver whether the digital certificate has been revoked; When the digital certificate of the data sender is within the validity period, the data receiver uses the public key of the digital certificate of the data sender to verify the digital signature of the plaintext data of the data to be sent. If the verification passes, the plaintext data of the data to be sent is obtained.

9. A control device for a traffic guidance screen, the control device comprising: A real-time traffic information acquisition unit, used to acquire the signature encrypted data of the real-time traffic information to be displayed on the traffic guidance screen, wherein the real-time traffic information is determined according to the third-party information reported by the third-party platform and the road condition information reported by the vehicle system and / or the traveler system; A decryption and signature verification unit, configured to decrypt and verify the signature encrypted data of the real-time traffic information according to a data decryption and signature verification process to obtain the plaintext data of the real-time traffic information; A display and broadcast unit is used for displaying the real-time traffic information on the traffic guidance screen and broadcasting the real-time traffic information to the vehicle-mounted system and / or the traveler system.

10. A traffic guidance screen, comprising A display screen for displaying real-time traffic information; The control device as described in claim 9 implements the steps of the method as described in any one of claims 1 to 8, controls the display of real-time traffic information on the display screen, and broadcasts the real-time traffic information to the vehicle system and / or the traveler system.

11. A control system for a traffic guidance screen, comprising: A traffic guidance screen, comprising a control device according to claim 9, implementing the steps of the method according to any one of claims 1 to 8, controlling the display of real-time traffic information on the traffic guidance screen, and broadcasting the real-time traffic information to an onboard system and / or a traveler system; The vehicle-mounted system is arranged on the vehicle passing by, and is used to communicate with the traffic guidance screen and other roadside units to realize vehicle-road cooperative communication between the vehicle and the roadside infrastructure; The traveler system is provided on the intelligent terminal of the traveler passing by, and is used to communicate with the traffic guidance screen and other roadside units to realize vehicle-road cooperative communication between the intelligent terminal and the roadside infrastructure; A cloud control platform, used for providing a safety management function for the vehicle-road cooperative communication between the traffic guidance screen and the vehicle-mounted system and / or the traveler system; Third-party platform, used for reporting third-party information.

12. An electronic device comprising: A processor, a memory, and a program stored in the memory and executable on the processor, wherein the program implements the steps of the method according to any one of claims 1 to 8 when executed by the processor.

13. A storage medium having a computer program or instruction stored thereon, wherein the computer program or instruction, when executed by a processor, implements the steps of the method according to any one of claims 1 to 8.

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