Vehicle and method for receiving copyrighted content by vehicle

Abstract

The invention relates to a vehicle (10) and to a method for receiving, by means of a vehicle (10), copyright-protected digital content encrypted with a key (PubK), said digital content being stored on a server external to the vehicle. A decryption of the digital content (VDC) encrypted with a key (PubK) is carried out using a private key (PrK), the key (PubK) forming a key pair with the private key (PrK). The vehicle (10) is designed to transmit a key (PubK) of a key pair via a communication interface (11) to a mobile radio terminal (20) associated with the vehicle (10) in order to cause the mobile radio terminal (20) to request and download content having the key (PubK) at an external server. The digital content (VDC), which is copyrighted and encrypted with a key (PubK), is then received from the mobile radio terminal (20).

Description

Technical Field

[0001] The invention relates to a vehicle and a method for receiving digital content which is protected by copyright and encrypted with a key via a vehicle. Background Art

[0002] In order to protect the illegal dissemination of copyrighted content, the content is encrypted with a key when it is called up / downloaded by the user, so that decryption with the corresponding individual (private) key is possible only for legitimate users. In order to be able to load copyrighted digital content, the application must request the content encrypted for it at the server together with the public key, which is assigned to the application. The digital content is then encrypted with the public key of the application and transmitted directly to the requesting application. The requesting application can decrypt the encrypted digital content with its private key. The request and loading of encrypted content sometimes results in very high data consumption depending on the type of digital content.

[0003] Although modern vehicles often have a mobile radio interface that allows for direct communication with other communication participants, such as a server outside the vehicle and / or a mobile radio participant, the mobile radio interface is usually not provided by the manufacturer for the transmission of large amounts of data. The background is the data protocol provided for the mobile radio interface, which is limited with respect to the amount of data to be transmitted for cost reasons.

[0004] In order to be able to play copyrighted content in a vehicle, the copyrighted content can be requested and loaded from a server, for example, by a mobile radio terminal assigned to the vehicle. After the encrypted content has been loaded and decrypted by the mobile radio terminal, the decrypted content can then be transmitted to an output unit of the vehicle. However, this is often not possible because the copyright owner of the digital content does not allow and technically prohibits the output of the decrypted content via the interface of the device that decrypts the digital content. Summary of the invention

[0005] The object of the present invention is to specify a motor vehicle and a method for receiving copyrighted digital content via a vehicle which are functionally improved and which can utilize existing digital rights management mechanisms.

[0006] This object is achieved by a vehicle according to the features of claim 1 and a method according to the features of claim 8. Advantageous embodiments result from the dependent claims.

[0007] According to a first aspect of the present invention, a vehicle is proposed, which includes a communication interface, a computing unit and an output unit. The communication interface is configured to receive digital content that is protected by copyright and encrypted with a key, and the digital content is stored on a server outside the vehicle. Digital content is understood to be audio and / or video data. Audio files are, for example, songs, voice data, podcasts, etc. Video data can be videos, films, streams, games and the like. Video data also generally includes audio data that matches dynamic images. The computing unit is configured to decrypt digital content encrypted with a key when using a private key. The key for encrypting digital content and the private key form a key pair here. In particular, the key for encrypting digital content is the public key of the key pair. The output unit is configured to output digital content decrypted with a private key. The output unit can therefore include one or more speakers and / or one or more display units. The display unit in the vehicle is particularly a display screen, a control display or a separate display screen in a sub-dashboard or on or in a dashboard bracket, which are, for example, fastened to the roof and / or the backrest of the front seat for rear passengers.

[0008] The vehicle is characterized in that, for receiving digital content that is protected by copyright and encrypted with a key, the vehicle is designed to transmit a key of a key pair to a mobile radio terminal assigned to the vehicle via a communication interface in order to cause the mobile radio terminal to request and download the content with the key from an external server. Furthermore, the vehicle is designed to receive digital content that is protected by copyright and encrypted with a key from the mobile radio terminal.

[0009] The communication interface for transmitting the encryption key to the mobile radio terminal device and receiving the encrypted digital content from the mobile radio terminal device comprises a wireless and / or wired interface. The wireless interface is designed in particular for communication with a short effective range and is based on wireless LAN, Bluetooth, etc. for example. The wired interface uses a cable connection to the mobile radio terminal device, for example a cable, via which the mobile radio telephone is simultaneously supplied with current from the vehicle electrical system.

[0010] Since the digital content is encrypted with the vehicle's (public) key, the vehicle can decrypt the encrypted digital content using its private key. This procedure can utilize existing digital rights management mechanisms without any changes, without having to use the vehicle's mobile radio interface to load the digital content. A mobile radio interface is to be understood as an interface via which a connection to a mobile radio network is established, for example according to the transmission standards 3G, 4G, LTE, etc.

[0011] The mobile radio terminal, in particular a smartphone, tablet, smartwatch or other computer of the vehicle user, is thus used as a proxy to load digital content on behalf of the vehicle. This approach makes it possible that the data protocol assigned to the mobile radio interface of the vehicle does not have to be used for downloading digital content. Instead, the mobile radio terminal of the vehicle user can be used for loading large amounts of data, wherein loading high amounts of data via a suitable data protocol is generally not a problem for this mobile radio terminal.

[0012] At the same time, the proposed approach ensures that the rules established by the copyright holder of the digital content for protecting the copyright are not violated. In particular, no changes are required to the hitherto known systems for digital rights management.

[0013] The key pair comprising the (public) key and the assigned private key is preferably assigned to the application running on the vehicle. This enables copyright-protected encrypted digital content to be played via the output unit of the vehicle even if the digital content is requested and loaded by another device (generally: the executor).

[0014] The key pair, which comprises a (public) key and an assigned private key, is expediently stored on a key management unit of the vehicle. The key management unit is designed to manage the key pair. It goes without saying that the key management unit can include a plurality of key pairs for managing different copyrighted content or can store them thereon. The management of the key pair can also include that the public key is temporarily or permanently (additionally) stored on a mobile radio terminal device assigned to the vehicle.

[0015] It is also expedient if the vehicle comprises an operator interface and is designed to transmit the key to the mobile radio terminal in response to a user input via the operator interface and to request and load digital content from the server. In other words, the vehicle user initiates the transfer of the key to the mobile radio phone by an input at the vehicle operator interface.

[0016] If the public key is stored on the mobile radio terminal associated with the vehicle at the time of the user input, then in response to the user input, information can be transmitted to the mobile radio terminal and the public key can be attached to the request message, with which the digital content is requested and loaded, or integrated into it.

[0017] Alternatively, the vehicle can be designed to transmit the key to the mobile radio terminal in response to a request from the mobile radio terminal, wherein the request is caused by a user input at the mobile radio terminal. In this embodiment variant, the vehicle user operates his mobile radio terminal in order to start, for example, the loading of digital content there and the subsequent playback at an output unit of the vehicle. In this case, the mobile radio terminal transmits a message to the vehicle, which then transmits the key to the mobile radio terminal in response to which it causes the mobile radio terminal to request and download the content with the key from an external server.

[0018] If the public key is stored on the mobile radio terminal associated with the vehicle at the time of the user input, then the information can be transmitted to the mobile radio terminal in response to a request from the mobile radio terminal, the public key being attached to the request message with which the digital content is requested and loaded or integrated into it.

[0019] According to a second aspect of the invention, a method for receiving digital content protected by copyright and encrypted with a key is proposed by a vehicle. The vehicle—as described above—comprises a communication interface for receiving digital content protected by copyright and encrypted with a key, the digital content being stored on a server outside the vehicle, a computing unit for decrypting the digital content encrypted with the key using a private key, wherein the key forms a key pair with the private key, and an output unit for outputting the digital content decrypted with the private key.

[0020] The method comprises the steps of transmitting a key of a key pair to a mobile radio terminal device assigned to the vehicle via a communication interface in order to cause the mobile radio terminal device to request and download content with the key from an external server. The method also comprises the steps of receiving digital content that is copyright protected and encrypted with the key from the mobile radio terminal device.

[0021] The method has the same advantages as described above in conjunction with the vehicle according to the invention.

[0022] Expediently, the vehicle comprises an operator interface, wherein the key is transmitted to the mobile radio terminal in response to a user input via the operator interface.

[0023] If the public key is stored on a mobile radio terminal associated with the vehicle at the time of the user input, information is transmitted to the mobile radio terminal in response to the user input in order to prompt the mobile radio terminal to attach the public key to a request message, with which digital content is requested and loaded, or to integrate it therein.

[0024] Alternatively, the vehicle transmits the key to the mobile radio terminal in response to a request from the mobile radio terminal, wherein the request is caused by a user input at the mobile radio terminal.

[0025] If the public key is stored on a mobile radio terminal associated with the vehicle at the time of the user input, information is transmitted to the mobile radio terminal in response to a request from the mobile radio terminal in order to prompt the mobile radio terminal to attach the public key to a request message with which digital content is requested and loaded or to integrate it therein.

[0026] Finally, the present invention includes a computer program product, which includes instructions which, when the program is executed by a computer, cause the computer to carry out the steps of the method described herein or its embodiment. The term computer here, when referring to the entirety of the units in the vehicle for carrying out the method, includes in particular a computing unit, a communication interface, an output unit and, if necessary, a key management unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The present invention will be described in more detail below with reference to the embodiments in the accompanying drawings.

[0028] Figure 1 A schematic diagram shows a vehicle according to the invention and a mobile radio terminal assigned to the vehicle, which is configured to request and download data from a server; and

[0029] Figure 2 A flow chart is shown which illustrates the reception of digital content which is copyright protected and encrypted with a key by a vehicle. DETAILED DESCRIPTION

[0030] Figure 1A schematic diagram of a vehicle 10 according to the present invention, a mobile radio terminal device 20 configured to the vehicle 10 and a server 30 on which digital content DC is stored is shown. The digital content DC includes in particular audio and / or video data. Audio files are, for example, songs, voice data, podcasts, etc. Video data can be videos, films, streams, games and the like. Video data usually also includes audio data that matches the dynamic image. The digital content DC is copyrighted content, the protection of which is based on an asymmetric encryption system. For this purpose, the following key pair is used in a known manner in the so-called public key encryption method, which consists of a public key PubK and a configured private key PrK. The functioning of such a public key encryption method is also known to those skilled in the art, as is the functioning of digital rights management, and therefore will not be further explained here.

[0031] Copyrighted digital content DC is stored in a memory 32 of a server 30, from which the digital content can be requested and loaded by an application. The server 30 includes a communication interface 31 and a processing device not further shown for processing requests, which are received in the form of a request message AN. According to the known principles of digital rights management, the application that requires and loads digital content DC transmits a public key PubK to the server 30 in a request message. The server 30 processes the request message AN and encrypts the digital content DC with the public key PubK for the application contained in the request message AN. The digital content VDC encrypted in this matching manner is then transmitted to the application. The application can then decrypt the encrypted digital content VDC with the private key PrK configured to the public key. The public key PubK and the private key PrK form a key pair, which is configured to the user of the application according to the principle of the application or for the digital content DC. The key pair is stored here on a memory accessible to the application.

[0032] In the example described here, the digital content DC is to be played via the vehicle. To this end, the application running in the vehicle 10 can send a request message AN directly to the server 30 (communication channel KK3 in the figure) via a mobile radio interface (not shown) according to the above-mentioned principle. A mobile radio interface is to be understood as an interface via which a connection to a mobile radio network is established, for example according to the transmission standards 3G, 4G, LTE, etc. For this purpose, the data protocol assigned to the mobile radio interface of the vehicle 10 must be used to download the digital content DC. This can be avoided using the method according to the invention described below, without violating the basic principles of digital rights management.

[0033] According to the invention, the mobile radio terminal 20 is used as a proxy in order to load digital content DC on behalf of the vehicle 10 .

[0034] In addition, the vehicle 10 includes a communication interface 11. The communication interface 11 includes a wireless and / or wired interface, by means of which communication (data exchange) with the mobile radio terminal device 20 can be realized. The wireless interface is particularly designed for communication with a short effective range and is based on a wireless LAN, Bluetooth, etc., for example. The wired interface uses a cable connection to the mobile radio terminal device 20, such as a cable, through which the mobile radio terminal device is simultaneously supplied with current from the vehicle power supply. The corresponding interface is known to those skilled in the art. As will be explained in addition below, copyright-protected and encrypted digital content VDC is received from the mobile radio terminal device 20 via the communication interface 11.

[0035] The vehicle 10 further comprises a computing unit which is configured to decrypt the encrypted digital content VDC received from the mobile radio terminal 20 using the private key PrK mentioned above. The decrypted digital content DC can then be played on the output unit 13 of the vehicle. The output unit 13 comprises one or more loudspeakers and / or one or more display screens for this purpose.

[0036] The vehicle 10 also includes a user interface 15 in a known manner, which includes input and output devices. The user interface 15 can be implemented, for example, in the form of a touch screen and / or physical buttons and / or a display screen and / or a lamp. Any combination of input and output devices is possible.

[0037] The key pair mentioned above, which includes a (public) key PubK and a private key PrK, is stored in the vehicle's key management unit 14. The key management unit 14 can store a plurality of key pairs. The key management unit 14 can be, for example, a specific storage area of ​​the computing unit 12 or can access it.

[0038] Each key pair is assigned to a specific combination of digital content DC and an application or user. This means that different key pairs are prepared for different digital content DC. Usually, the key pair is assigned to a specific user, such as a vehicle user. In other words, the digital content is encrypted with the corresponding public key PubK of the key pair. The key pair can also be assigned to the vehicle 10.

[0039] exist Figure 1The mobile radio terminal device 20 shown in the figure is a mobile radio terminal device configured to the vehicle 10 by the vehicle user. The configuration of the mobile radio terminal device 20 to the vehicle 10 can be realized, for example, by coupling the components to each other. The mobile radio terminal device 20 can be a conventional smart phone, a tablet computer, a smart watch and the like. The mobile radio terminal device 20 includes a communication interface 21 and a user interface 22 in a known manner, and the user interface includes input and output devices. The user interface 22 can be implemented in the form of a touch screen and / or physical buttons, for example. Similarly, a combination of a display screen and buttons or other input devices can also exist instead of a touch screen.

[0040] The mobile radio terminal 20 can communicate with the communication interface 11 of the vehicle 10 via the communication interface 21 (communication channel KK1) and exchange data in this process. Likewise, the mobile radio terminal 20 is configured to exchange data with the server 30 via the communication interface 23 (communication channel KK2). The communication interface 23 is in particular a mobile radio interface, via which a connection to a mobile radio network is established, for example according to the transmission standards 3G, 4G, LTE, etc. A data protocol assigned to the mobile radio terminal 20 is usually established in this case. The communication between the mobile radio terminal 20 and the server 30 can also be based on a wireless local area network.

[0041] In order to be able to play copyright-protected and encrypted digital content VDC in the vehicle 10, it is provided according to the invention that the public key PubK of the key pair is transmitted via the communication interface 11 of the vehicle 10 to the mobile radio terminal 20 assigned to the vehicle 10. The transmission of the public key PubK is carried out together with or in a request message AN, which prompts the mobile radio terminal 20 to request and download the digital content DC with the public key PubK from the external server 30.

[0042] The download of the digital content DC, which is then encrypted with the public key PubK of the vehicle or of an application running on the vehicle, is then loaded by the mobile radio terminal 20 via the communication channel KK3. Subsequently, the encrypted digital content VDC is transmitted to the vehicle 10 via the communication channel KK2.

[0043] The communication interface 11 forwards the encrypted digital content VDC to the computing unit 12 for decryption using the private key PrK of the key pair, which is transmitted to the mobile radio terminal 20. The decrypted digital content DC can then be output on the output unit 13 of the vehicle. Figure 2 Shown in.

[0044] The initial point for loading copyrighted content DC is a request message AN from the computing unit 12 , which includes a public key PubK assigned to the vehicle or an application running on the vehicle and the digital content DC to be loaded.

[0045] A request message AN with a public key PubK is transmitted from the vehicle 10 to the mobile radio terminal 20 for the purpose of requesting a signal stimulus for digital content. It may be the detection of a user input via the operator interface 15 of the vehicle 10. If the computing unit 12 detects such a user input via the operator interface 15, the request message and the key PubK are transmitted to the mobile radio terminal 20. Alternatively, if a corresponding user input is detected at the mobile radio terminal 20, the request message and the key PubK are transmitted to the mobile radio terminal 20. These two variants represent user interactions that can be performed selectively either at an operating element of the vehicle 10 or at a user interface of the mobile radio terminal 20.

[0046] In another alternative embodiment, the signal stimulus for transmitting the public key PubK to the mobile radio terminal 20 can also be automatically realized by artificial intelligence, such as, for example, when a certain location, a certain route, a certain date and / or time or a certain other event is detected. The automatic detection, which can be realized, for example, by means of artificial intelligence, can optionally take place both in the vehicle 10 and in the mobile radio terminal 20.

[0047] Another embodiment provides that the public key PubK is temporarily or permanently stored in a mobile radio terminal device assigned to the vehicle, wherein, in the presence of the above-mentioned event (recognition of an operation of a user interface of the vehicle 10 or the mobile radio terminal device 20 or automatic recognition by artificial intelligence), a request message AN to be sent to the server is generated by the mobile radio terminal device 20 and added to the public key PubK.

[0048] The message AN containing the public key PubK is then transmitted to the mobile radio terminal 20 via the communication interface 11 of the vehicle 10. The mobile radio terminal 20 receives the request message AN via its communication interface 21 and forwards it unchanged to the server 30 via its communication interface 22. If the public key PubK is added to the request message AN by the mobile radio terminal, the request message AN is modified or supplemented, if necessary.

[0049] The server 30 encrypts the content DC stored and requested in its data memory 32 with the public key PubK contained in the request message AN, thereby obtaining the encrypted digital content VDC. The encrypted digital content VDC is transmitted by the server 30 to the mobile terminal 20 and from there back to the vehicle 10.

[0050] After receiving the encrypted digital content VDC via the communication interface 11, the encrypted digital content is transmitted to the computing unit 12 for decryption (DEC) by the computing unit 12. After decryption, the decrypted digital content DC is forwarded to the output unit 13 for output.

[0051] The method according to the invention is that in a motor vehicle, an application which wishes to output certain digital content forwards the public key PubK assigned to it to a mobile radio terminal, which acts as a proxy. The mobile radio terminal requests the digital content from a server with the (from the perspective of the mobile radio terminal) "external" public key and downloads it in order to then forward it to the original application in the vehicle. Only the application running in the vehicle can then play the digital content, since only it has access to its private key.

[0052] In a specific example, a video application (video app) in a vehicle can use an app running on a mobile radio terminal and thus the mobile radio terminal as a proxy. The vehicle's video app forwards its public key to the mobile radio terminal's app, which is then responsible for requesting and downloading digital content. Encryption and playback are then performed by components of the vehicle. The loading of digital content can be performed by communication between the mobile radio terminal and the vehicle, for example via wireless LAN or Bluetooth, without having to load data onto the mobile radio connection.

[0053] Reference numerals list

[0054] 10 Vehicles

[0055] 11 Communication Interface

[0056] 12 computing units

[0057] 13 output units

[0058] 14Key Management Unit

[0059] 15 Operator Interface

[0060] 20 Mobile radio terminal equipment

[0061] 21 First communication interface

[0062] 22 User Interface

[0063] 23 Second communication interface

[0064] 30 servers

[0065] 31 Communication interface

[0066] 32 data memory

[0067] DC Unencrypted Digital Content

[0068] VDC encrypted digital content

[0069] PubK (public) key

[0070] PrK Private Key

[0071] AN Request Message

Claims

1. Vehicle (10), include: - a communication interface (11) for receiving digital content (VDC) protected by copyright and encrypted with a key, said digital content being stored on a server external to the vehicle; - a computing unit (12) for decrypting the digital content (VDC) encrypted with the key (PubK) using the private key (PrK), wherein the key (PubK) forms a key pair with the private key (PrK); - an output unit (13) for outputting the digital content (DC) decrypted with the private key (PrK), The invention is characterized in that the vehicle (10) is designed to receive digital content (VDC) which is copyright-protected and encrypted with a key (PubK) for: - transmitting the key (PubK) of the key pair via a communication interface (11) to a mobile radio terminal (20) assigned to the vehicle (10) in order to cause the mobile radio terminal (20) to request and download content having the key (PubK) from the external server; - receiving the digital content (VDC) which is protected by copyright and encrypted with a key (PubK) from a mobile radio terminal (20).

2. The vehicle (10) according to claim 1, It is characterized in that The key (PubK) for encrypting the digital content (VDC) is the public key (PubK) of the key pair.

3. The vehicle (10) according to claim 1 or 2, It is characterized in that A key pair comprising a secret key (PubK) and an assigned private key (PrK) is assigned to an application running on the vehicle (10).

4. The vehicle (10) according to claim 1, It is characterized in that The key pair is stored in a key management unit (14) of the vehicle (10), and the key management unit is configured to manage the key pair.

5. The vehicle (10) according to any one of claims 1 to 4, It is characterized in that The vehicle (10) comprises an operator interface (15) and is designed to transmit the cryptographic key (PubK) to the mobile radio terminal (20) in response to a user input via the operator interface (15).

6. The vehicle (10) according to any one of claims 1 to 4, It is characterized in that The vehicle (10) is designed to transmit the key (PubK) to the mobile radio terminal (20) in response to a request from the mobile radio terminal (20), wherein the request is caused by a user input at the mobile radio terminal (20).

7. The vehicle (10) according to one of the preceding claims, It is characterized in that The encrypted digital content (VDC) includes audio and / or video data.

8. Method for receiving digital content (VDC) protected by copyright and encrypted with a key (PubK) by a vehicle (10), in, The vehicle (10) comprises: - a communication interface (11) for receiving digital content (VDC) protected by copyright and encrypted with a key (PubK), said digital content being stored on a server (30) outside the vehicle; - a computing unit (12) for decrypting the digital content (VDC) encrypted with a key (PubK) using a private key (PrK), the key (PubK) forming a key pair with the private key (PrK); - an output unit (13) for outputting the digital content (DC) decrypted with the private key (PrK), The method comprises the following steps: - transmitting the key (PubK) of the key pair via a communication interface (11) to a mobile radio terminal (20) assigned to the vehicle (10) in order to cause the mobile radio terminal (20) to request and download content having the key (PubK) from the external server (30); - receiving the digital content (VDC) which is protected by copyright and encrypted with a key (PubK) from a mobile radio terminal (20).

9. The method according to claim 8, It is characterized in that The vehicle (10) comprises an operator interface (15), wherein the cryptographic key (PubK) is transmitted to the mobile radio terminal (20) in response to a user input via the operator interface (15).

10. The method according to claim 8, It is characterized in that The vehicle (10) transmits the key (PubK) to the mobile radio terminal (20) in response to a request from the mobile radio terminal (20), wherein the request is caused by a user input at the mobile radio terminal (20).

11. A computer program product comprising instructions which, when the program is executed by a computer, cause the computer to execute the steps of the method according to any one of claims 8 to 10.

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