334 results about "Transmission security" patented technology

The invention provides an identity recognition method and system based on unmanned aerial vehicle management and control. The method comprises the following steps: acquiring encrypted identity data based on unmanned aerial vehicle state monitoring, and generating an initial code containing a unique identifier, a position and a state parameter; dynamically adjusting a coding rule according to the acceleration variation, and generating a differential sequence matched with the motion state; generating a composite identifier containing a timestamp and a geo-fence through irreversible conversion; fusing the positioning data to dynamically bind the identifier and the track to generate synchronous track data; when the geofence is triggered, redundancy calibration is activated to generate anti-interference data; the composite identification and the anti-interference data are subjected to fragmentation packaging, and a topology dependence encryption block is constructed through a Hash abstract chain; and recombining the encrypted blocks in sequence based on the Hash chain, and checking the space-time consistency of the encrypted blocks and the geofence during recombining. According to the invention, the identity anti-counterfeiting and cross-region transmission security in the dynamic flight of the unmanned aerial vehicle is improved.

The invention belongs to the technical field of data processing, and discloses an information technology analysis system and method based on cloud computing, and the method comprises the steps that a network building module caches static data to nodes nearby a user through a CDN; the resource scheduling module monitors and dynamically allocates resources in real time; the data storage module realizes data redundancy storage; the data acquisition module performs multi-source data acquisition; the data integration module integrates data of different data sources; the data management module manages the whole data process; the data analysis module carries out multi-source data fusion analysis and mines a potential relationship; the result display module provides an intuitive and easy-to-use interface; the security management module guarantees data storage and transmission security; and the monitoring management module deploys a monitoring tool to monitor system operation in real time. According to the method, dynamic allocation and efficient utilization of resources are achieved, deep data analysis is achieved, training is accelerated through distributed computing, automatic model updating is achieved, multi-source data fusion and deep mining are conducted, and a scientific basis is provided for decision making.

The invention provides an industrial control and infrastructure defense cooperation method and system based on digital twinning, and relates to the technical field of defense cooperation. The method comprises the following steps: based on a digital twinning technology, collecting sensor data in an industrial control system, and identifying abnormal fluctuation of equipment operation to obtain abnormal activity information; the occurrence frequency and intensity of the deviation data are analyzed, and the network data transmission security of the industrial entity is optimized to obtain security protocol optimization configuration; reconfiguring the network access authority, and monitoring the new access mode and the data flow in real time to obtain an access control optimization state; monitoring network behaviors by using an isolated forest algorithm, and quantitatively evaluating potential internal and external threats to obtain a threat evaluation update log; and adjusting the data acquisition frequency and the processing process based on the update log, and obtaining a dynamic cooperative defense mechanism by updating network defense and response rules. According to the invention, the early warning and response capability of the industrial control system can be optimized.

The invention belongs to the technical field of cross-border data security, and provides a cross-border personal data transmission security detection method and system based on differential privacy, and the method comprises the steps of multi-dimensional situation awareness, privacy budget allocation, interpretability and audit, and execution and response. By synchronously sensing technical environment risks, multi-national regulation constraints and multi-modal data features, comprehensive control of the cross-border transmission security situation is realized, and one-sidedness of single-dimensional sensing is avoided; privacy budget is dynamically allocated under multiple constraints based on a deep Q network algorithm, so that the protection intensity of high-sensitivity data is ensured, and excessive loss of effectiveness of low-sensitivity data is avoided; an interpretable report is generated in combination with causal analysis, full-process evidence storage is realized by relying on an alliance chain, the problems of decision black box and audit tracing are solved, cross-border supervision requirements are met, and the balance of cross-border transmission in the aspects of safety, compliance and availability is improved.

The invention discloses a dynamic encryption method and a dynamic encryption device for secure transmission, and relates to the technical field of secure encryption and transmission, and the method comprises the steps: receiving a secure transmission task sent by a user side; performing security risk fuzzy detection to obtain a path risk fuzzy detection result; performing encryption optimization configuration to obtain an initial encryption strategy; obtaining current node update monitoring data corresponding to the current transmission node; inputting a transmission security risk prediction channel to obtain a current node prediction risk coefficient; and performing dynamic encryption optimization according to the current node update monitoring data to obtain a current node optimization encryption strategy, and performing secure transmission on communication transmission data. The technical problems that in the prior art, static encryption lacks flexibility, cannot adapt to complex transmission environment changes and transmission path safety risk assessment is insufficient, so that data transmission safety and reliability are insufficient are solved, and the technical effect of improving data transmission safety and reliability is achieved.

The invention relates to the technical field of communication security, in particular to a communication encryption method and device, equipment, a storage medium and a computer program product. The method comprises the following steps: dynamically generating a main session key between two communication parties based on a preset key negotiation protocol; dynamically generating sub-keys according to a preset time interval based on the main session key and the key sequence; performing encryption processing on each data block in the communication data stream based on the sub-key and the encryption strategy; generating a message authentication code for each encrypted data block; adding timestamp information based on the message authentication code, and introducing a random offset into the timestamp information; and the encrypted data blocks, the message authentication code and the timestamp information are packaged into the target data message, so that the transmission security of the communication data is improved.

The present invention discloses a method and device for transmitting network time synchronization messages applicable to any channel environment, including: classifying the data bits of the time synchronization messages to be transmitted to obtain public information bits and secret information bits, and performing Polar coding on the data of the time synchronization messages to obtain a first coding sequence; dividing all data subcarriers within the transmission bandwidth into sub-blocks according to the number of legitimate receivers, and dividing each sub-block to obtain clusters, performing IM modulation on each cluster to determine the active subcarrier indices of each cluster; interleaving the symbol vector obtained by modulating the first coding sequence based on the total frequency-domain channel matrix characteristics of a preset channel simulation system; modulating the interleaved symbol vector onto the active subcarriers selected for each sub-block to complete OFDM-IM modulation, and sending the modulated OFDM-IM signal to each legitimate receiver. The present invention solves the problems of poor security and limited application scenarios in the transmission of network time synchronization messages.

The invention discloses a communication method and system for real-time downloading of vehicle-mounted data, and the method comprises the steps: a ground downloading terminal transmits at least one data downloading request to a wireless transmission platform, the wireless transmission platform carries out resource configuration according to the priority parameters of the data types and sends at least one data downloading request to the vehicle-mounted diagnosis recording unit, the vehicle-mounted diagnosis recording unit carries out identity verification on the at least one data downloading request, if verification succeeds, the at least one data downloading request is decrypted and sent to the vehicle-mounted ATP, and the vehicle-mounted ATP sends the decrypted data downloading request to the wireless transmission platform; and the vehicle-mounted ATP responds to the at least one data downloading request, and encrypts and transmits the corresponding vehicle-mounted log data to the ground downloading terminal according to a priority sequence. According to the invention, the data in the wireless transmission process is dynamically encrypted, and the priority is distinguished according to the data type in the transmission process, so that the vehicle-mounted data can be quickly acquired on the premise of ensuring the transmission safety of the vehicle-mounted data, and the troubleshooting, analysis and repair of faults can be quickly realized.

The invention relates to network information security and cryptography, and provides an AES-based network information data transmission security method, which comprises the following steps of: generating an information key, namely generating a round key through loop iteration; the encryption process of information data transmission comprises the following steps: encrypting a plaintext after preprocessing, and generating an intermediate ciphertext and an integrity verification label; in the information data decryption process, the plaintext is recovered through reverse operation after the label is verified; the data security constraint of the information is carried out, and a multi-level defense system is constructed; aP I mapping for information transmission, and calling an interface to realize encryption, decryption and authentication verification; information data encryption complexity is controlled, complexity is optimized, and big data are encrypted in a blocking mode; the information data security is guaranteed, and the transmission security is ensured. The method significantly enhances data security, improves transmission efficiency, constructs multi-level security defense, provides flexibility and adaptability, simplifies implementation and management, conforms to the future security trend, and provides an efficient, reliable and easy-to-use solution for network information security.

The invention discloses a firmware upgrading method based on fragmentation transmission under a Zigbee network, which comprises the following steps: S1, firmware fragmentation and storage: firstly, a firmware file is segmented into a plurality of 32-byte fragments, and the fragments are stored in a storage space of an upgrading system; s2, an OTA upgrade starting command is sent; s3, fragmented data is transmitted in a mode of sending fragmented data one by one, and a system sends one fragmented data each time and waits for a confirmation signal of equipment; s4, recording a transmission state; s5, a retransmission mechanism; s6, verification and installation are carried out; s7, upgrading completion and state feedback; the problems that in the prior art, the firmware transmission failure rate is high, and upgrading failure is uncontrollable can be effectively solved. The transmission reliability in a low-bandwidth network environment is ensured by a fragmented transmission and automatic retransmission mechanism; due to the limitation of breakpoint resume and retransmission times, the overall upgrading efficiency is optimized, and excessive consumption of system resources is avoided; the data transmission security is high, the reliability of equipment upgrading is enhanced, and the method is easy to expand and implement and suitable for large-scale equipment upgrading.

The invention relates to the technical field of data security protection, in particular to a project supervision file anti-leakage method and system, and the method comprises the steps: encrypting a file through a CP-ABE encryption technology, binding an access control attribute, dynamically adjusting the authority and a secret key according to the project progress, and guaranteeing the precise control of file access. An invisible watermark is embedded before file transmission, a target platform is judged, and if the target platform is an uncontrolled platform, a security sandbox is created for decryption, so that transmission security is guaranteed. Meanwhile, an operation log is recorded and stored in the block chain, abnormal behaviors are detected through the knowledge graph, file tracing is achieved in combination with watermarks, and the audit tracing ability is enhanced. And when the destroying condition is met, the system automatically destroys the file and cancels the decryption key, so that the leakage risk is eliminated. According to the invention, file leakage is effectively prevented, file security management and access tracking are realized, and the security, access control accuracy and auditing traceability of project supervision files are improved.

The invention discloses a mobile payment encryption system based on a data random algorithm, and the system comprises a collection module which is used for collecting multi-modal data, and constructing a cross-modal entropy source pool; the random seed generation module is used for extracting feature vectors from the cross-modal entropy source pool and generating initial random seeds; the time sequence self-adaptive random chain module is used for generating a random factor sequence based on the initial random seed recursion and forming a random chain structure; the encryption module is used for jointly encoding the random factor sequence and transaction data to be encrypted, generating a dynamic encryption parameter set and encrypting the transaction data; and the chain type updating module is used for collecting network environment parameters, updating the time sequence self-adaptive random chain and generating a new dynamic encryption parameter set so as to form a chain type evolved encrypted data sequence. According to the method, the cross-modal entropy source and the time sequence random chain are utilized to realize dynamic encryption of the mobile payment data, and the method has the advantages of high entropy randomness, strong attack resistance and high transmission security.

The invention provides a distributed photovoltaic data acquisition method and device based on adaptive encryption communication and multi-link redundancy, and the method comprises the steps: collecting real-time power generation data, equipment state data and environment parameters of a photovoltaic system through a multi-source sensor, and forming original data; an MQTT over TLS adaptive encryption communication protocol is adopted to perform end-to-end encryption on original data, and dynamic key management is combined to ensure transmission security; based on a dynamic link selection algorithm, encrypted data is transmitted to a power master station through 4G and LoRaWAN double-link redundancy, so that the transmission reliability is improved; and the master station side decrypts the data and then integrates the data to a database to support power grid dispatching and predictive analysis. According to the invention, the problems of safety and reliability in distributed photovoltaic data acquisition are solved, and the method is suitable for a smart power grid monitoring scene with high reliability and high real-time performance requirements.

The invention provides a TBOX-based vehicle fault diagnosis system, which is characterized in that a TBOX is installed in a vehicle and is used for acquiring vehicle data and judging whether the vehicle has a fault based on the vehicle data, and when the vehicle has the fault, the TBOX enters a diagnosis and maintenance mode, and the diagnosis and maintenance mode comprises a field diagnosis mode and a remote diagnosis mode; the diagnosis end is used for establishing a data communication channel with the TBOX in a diagnosis maintenance mode; and the TBOX is also used for transmitting the vehicle fault data to the diagnosis end through the data communication channel, receiving a vehicle configuration instruction issued by the diagnosis end, and issuing the vehicle configuration instruction to a target ECU unit of the vehicle to realize vehicle fault diagnosis full-link diagnosis operation. According to the scheme, a traditional fault diagnosis instrument is omitted, hardware cost of vehicle service diagnosis is reduced, usability and convenience of vehicle diagnosis are provided, and transmission safety and reliability between the TBOX and a platform or a terminal are guaranteed through a self-developed data transmission protocol.

The invention discloses a data processing method, device and equipment and a computer readable storage medium, and belongs to the technical field of communication. The method comprises the steps that a first device obtains first data; determining an attribute label of the first data, wherein the attribute label indicates attribute information of the first data in different dimensions; second data is acquired according to the first data and the attribute tag, the second data comprises the first data and further comprises at least one of the attribute tag and a sending strategy obtained based on the attribute tag, and the sending strategy indicates whether equipment receiving the second data intercepts the second data or not; and transmitting the second data to the second device. Whether the first data needs transmission protection or not is determined according to the attribute information of different dimensions, so that the sending strategy is determined, data leakage caused by release of the data which is not to be sent is avoided, and the data transmission security is high. In addition, the sending strategy can be determined according to the attribute tag, and the sending strategy determination involves few processes, is simple to operate and has high efficiency.

The invention discloses a user identity authentication method and device based on a block chain, and relates to the technical field of block chains and quantum encryption, and the method comprises the steps: obtaining multi-mode identity authentication information which is collected based on a probe program and is generated when a user carries out the user identity authentication at a client; encoding the multi-modal identity authentication information based on target quantum bit superposition state information generated by the quantum key; sending a 5G message carrying the quantum coded data to a quantum inspection node of the block chain; the quantum inspection node is used for observing whether the carried quantum bit superposition state information is in a collapsed state; when the quantum code data is not in the collapsing state, the quantum code data is sent to a bank authentication node; and after the identity authentication performed by the bank authentication node is passed, sending notification information indicating that the identity authentication is passed to the client of the user. The invention is used for improving the transmission security of data related to user identity authentication, improving the accuracy of the user identity authentication process and reducing the security risk.

A unification method based on data acquisition interfaces of different SCADA (supervisory control and data acquisition) production monitoring systems of a sewage plant comprises the following steps: analyzing private protocols such as Modbus through protocol conversion middleware, and standardizing data streams; establishing association between the unique identifier and the data stream by using an equipment mapping mechanism to form a data mapping table; a data normalization algorithm is adopted to unify a field format, and missing values are filled through linear interpolation. And an increment adaptation module is designed to realize compatibility of new and old system interfaces, and AES-256 encryption is combined to guarantee transmission security. The transmission rate is dynamically adjusted based on the network state, and video and production data are fused. A multi-protocol environment is adapted through an adaptive protocol adjustment module, and finally data integrity is ensured by using a CRC check and retransmission mechanism. According to the scheme, a technical closed loop from protocol conversion to multi-source fusion is constructed, the problems of data island and compatibility of the SCADA system of the sewage plant are solved, and the data management efficiency and reliability are improved.

The invention discloses an automobile part data life cycle safety test system, and relates to the technical field of automobile part data safety. Comprising a data classification and label module, a storage security test module, a transmission security test module, a use and destruction security module, a compliance and risk assessment module, a full-link linkage test engine, a digital twin drive module and an adaptive test process engine. The method has the advantages that data classification, storage, transmission, use and destruction links are dynamically connected in series by a directed acyclic graph through an event-driven workflow orchestrator of a full-link linkage test engine, and fault injection and risk evolution deduction are executed; a three-dimensional twin space link risk propagation path comprising a physical entity model and a data flow topology is constructed by means of a digital twin driving module, full-link detection of cross-link vulnerabilities such as'mismatching of classification labels and encryption strategies' 'permission combination attack ''and the like is realized, and the systematic risk omission ratio is reduced.

The invention discloses a shipborne communication data encryption transmission method and system based on a satellite 5G fusion network, and relates to the technical field of satellite communication encryption. Data classification and priority division: dividing the data into five types of navigation instructions according to service types, marking P1-P4 priorities, and adding information; encryption strategy selection: adding random salt values by using algorithms such as hybrid encryption, AES, DES, TEA and the like according to priorities; network routing is fused, satellite and 5G state parameters are collected, and paths are selected according to priorities; real-time encryption transmission, fragmentation and information addition are carried out, FEC is used for satellites, and HARQ is used for 5G; the transmission state is monitored and dynamically adjusted, and the parameters are synchronously encrypted during over-limit time adjustment and switching; decrypting and verifying, namely decrypting and verifying after verifying and recombining; secret key updating management, life cycle setting, KDC distribution and emergency updating are carried out. According to the method, the shipborne data transmission security and network adaptability are improved, the encryption efficiency and continuity are optimized, the cost is reduced, multiple scenes are adapted, and the security and high efficiency of maritime communication are ensured.

The invention relates to the field of mine wireless communication security, and discloses a wireless instruction encryption method and system for mining intrinsic safety type equipment. The method comprises the following steps: collecting historical mine environment data and extracting features to obtain characterization environment description; constructing a nonlinear mapping function of the multipath propagation characteristic and the interference degree of the signal; collecting current environment data to calibrate the nonlinear mapping function to obtain a calibrated model; obtaining an encryption strength prediction value based on the current environment data in combination with the calibrated model; if the predicted value is lower than the encryption strength threshold value, key parameters are adjusted to generate optimized encryption configuration; based on the configuration, a support vector machine is adopted to classify the dynamic environment data, an interference area is divided, and an adjustment coefficient of the interference area is determined; and adjusting the encryption parameter in real time according to the coefficient to obtain an encryption strength adjustment scheme matched with the actual demand. According to the method, the problem that the wireless instruction encryption strength is not matched in a complex mine environment is solved, and the wireless instruction transmission safety and adaptability are improved.

The invention discloses a secure printing method and system for sensitive data, and relates to the field of secure printing, and the method comprises the steps: carrying out the authority grading of a user accessing a sensitive file through constructing an authority authentication module, and recording the access information of the user; constructing an information encryption module to divide a sensitive file into a limited number of data clusters, encrypting the data clusters by adopting a data folding encryption mode, introducing equivalent interference data clusters at the same time, and protecting sensitive data by using a channel detection mechanism and a data self-destruction mechanism; and a printing module is constructed to match and decrypt the encrypted file to obtain a sensitive file, and the sensitive file is printed by using a private domain service network to ensure the data security in the printing process. Transmission safety of the sensitive data is guaranteed through sensitive data folding encryption and a data self-destruction mechanism, printing safety of the sensitive data is guaranteed through a private domain service network, and safe printing of the sensitive data is effectively achieved.

The invention relates to the technical field of Internet of Vehicles, and provides a vehicle data transmission method and device, electronic equipment and a storage medium. The method comprises the steps of obtaining vehicle data and N serialization processing types of the vehicle data, performing variable-length serialization processing on the vehicle data according to the N serialization processing types to obtain N pieces of compressed vehicle data, determining target data in the N pieces of compressed first vehicle data based on a data transmission strategy, and transmitting the target data to a server according to the determined target data. According to the method, the target data is encrypted, and finally the encrypted target data is sent to the TSP server according to the service quality level, so that the vehicle data can be compressed through serialization processing, and the compressed vehicle data of the target type can be selected for transmission, and the flexibility of data transmission is improved; and meanwhile, the transmission security and reliability are improved by utilizing encryption processing and a quality grade sending strategy, and the data transmission efficiency is improved.

The invention discloses a remote communication method for a surgical robot, a storage medium and a program product, and the method comprises the steps: receiving first control data sent by a remote control end which carries out the remote control of the surgical robot in response to the starting of a remote mode; wherein the first control data is obtained by encrypting original control data by the remote control end by adopting a preset encryption algorithm; the preset encryption algorithm comprises a symmetric encryption algorithm and / or an asymmetric encryption algorithm; decrypting the first control data by adopting a target decryption algorithm corresponding to the preset encryption algorithm to obtain second control data, and determining a target response mode of the surgical robot for the second control data according to the second control data and preset control logic; wherein the preset control logic at least comprises the adjustment logic of the working state of the surgical robot, so that the transmission safety of the remote surgical data and the operation safety of the surgical robot are improved.

The embodiment of the invention discloses an energy storage control system information transmission and index evaluation method and system. The method comprises the following steps: acquiring signal data of a lower computer of a hydropower station unit and transmitting the signal data to a remote centralized control target center; obtaining the integrity of unit lower computer signal data received by the target center; obtaining the availability of unit lower computer signal data received by the target center; acquiring the transmission safety of the acquired hydropower station unit lower computer signal data to a target center; and based on integrity, availability and transmission security, determining evaluation information of the acquired hydropower station unit lower computer signal data. According to the method, by comprehensively considering integrity, usability and safety, powerful support can be provided for a remote centralized control operation on-duty mode, an operator can accurately monitor the operation state of a unit in a remote centralized control center in real time and perform remote operation and control, centralized management and optimal scheduling of a hydropower station are achieved, and the production efficiency and the management level are improved.

The present application belongs to the technical field of communications. Disclosed are a data processing method, and an apparatus, a device and a computer-readable storage medium. The method comprises: a first apparatus acquiring first data; determining an attribute tag of the first data, wherein the attribute tag indicates attribute information of the first data in different dimensions; acquiring second data on the basis of the first data and the attribute tag, wherein the second data comprises the first data and further comprises at least one of the attribute tag and a sending policy obtained on the basis of the attribute tag, and the sending policy instructs a device, which receives the second data, as to whether to intercept the second data; and sending the second data to a second apparatus. Whether the first data needs transmission protection is determined on the basis of the attribute information in different dimensions, so as to determine a sending policy, thereby avoiding data leakage caused by releasing data that should not be sent, and thus the security of data transmission is high. In addition, the sending policy can be determined on the basis of the attribute tag, such that few flows are involved in the determination of the sending policy, and thus the operation is simple, and the efficiency is high.

The invention discloses a sensitive information secure transmission system, which comprises an information sending end and an information receiving end, and is characterized in that after receiving an original image and sensitive information, the information sending end generates a secret-containing carrier image through multi-scale frequency domain decomposition, sensitive information encryption scattering embedding, wavelet inverse transformation reconstruction and dual-channel processing architecture processing and sends the secret-containing carrier image; and the information receiving end extracts the encrypted sensitive information after receiving the encrypted carrier image, and analyzes and outputs the sensitive information after three-level integrity verification. According to the system, the defects of limited information hiding capacity, weak anti-interference capability, unreliable integrity detection and difficulty in self-adaption of an embedding strategy in the prior art can be overcome, high-density embedding of sensitive information, strong anti-interference performance, complete protection and self-adaption of the embedding strategy are realized, and visual concealment, image quality and transmission safety are balanced.

The embodiment of the invention provides a data transmission method and device and a data transmission system, and relates to the technical field of network security. The method comprises the steps that ground terminal equipment generates a true random number as a first secret key serial number and sends the first secret key serial number to vehicle-mounted terminal equipment, the ground terminal equipment and the vehicle-mounted terminal equipment are configured with the same preset secret keys, and a secret key corresponding to the first secret key serial number in the preset secret keys serves as the first secret key; generating a random digital tag encrypted through the first key, and sending the random digital tag to the vehicle-mounted terminal equipment; and after decryption loading feedback of the vehicle-mounted terminal equipment on the random digital tag is received, generating a true random number as a second secret key serial number, sending the second secret key serial number to the vehicle-mounted terminal equipment, taking a secret key corresponding to the second secret key serial number in the preset secret keys as a second secret key, and performing encryption communication with the vehicle-mounted terminal equipment by using the second secret key. According to the invention, secure distribution of quantum keys in a train-ground communication application scene can be realized, and the train-ground transmission security is improved.

The invention belongs to the technical field of signal transmission, and discloses a signal transmission and encryption method and system for an anti-explosion scene Internet of Things mobile handheld device. The method comprises the following steps: collecting real-time multi-dimensional state monitoring data of the Internet of Things mobile handheld device in an explosion-proof scene; acquiring a real-time health index of the real-time multi-dimensional state monitoring data, and if the real-time health index exceeds a health index threshold, entering the next step; state abnormity detection is carried out; signal transmission and encryption optimization are carried out; switching a signal transmission channel of the multi-path signal transmission fusion network; updating the dynamic encryption algorithm of the signal to be transmitted; and according to the real-time dynamic encryption algorithm, encrypting a to-be-transmitted signal of the Internet of Things mobile handheld device, and performing signal transmission on the encrypted to-be-transmitted signal by updating the signal transmission channel. According to the invention, the problems of unstable signal quality, low transmission security and insufficient real-time performance in the prior art are solved.

The invention discloses a mail encryption transmission method. The method comprises the following steps: obtaining mail content edited by a mail sender; encrypting the mail content, generating an encrypted mail content URI (Uniform Resource Identifier) for identifying the encrypted mail content, and storing the encrypted mail content into a mail storage server; sending a mail object containing the encrypted mail content URI to a mail receiver through a mail transmission service; and after a mail receiver receives the mail object, acquiring the corresponding encrypted mail content from the mail storage server according to the encrypted mail content URI in the mail object, decrypting the encrypted mail content, and displaying the decrypted mail content. The invention also discloses a mail encryption transmission device for realizing the mail encryption transmission method, computer equipment and a storage medium. According to the invention, the mail transmission security is improved, and the problem of mail size limitation is solved.

The invention relates to the technical field of information security, and discloses a Bootloader signature verification method based on information security, which is characterized in that a security storage module is integrated in a vehicle-mounted instrument system and is used for storing public key and session key information; a Diffie-Hellman algorithm operation environment is deployed, so that two communication parties support a key exchange protocol, an initial key pair is generated in advance, the key pair comprises a public key and a private key, the public key is stored in a secure storage area, and the private key is securely kept by a server side; configuring a firmware segmentation rule, and writing the firmware segmentation rule into a system signature verification program; and defining signature verification failure triggering conditions and response measures. According to the Bootloader signature verification method based on information security, firstly, transmission security is guaranteed through a session key, then segmented signature verification is executed to ensure the legality of firmware, and finally, the key is updated to prepare for next signature verification. Through time sequence cooperation of key dynamic and signature verification segmentation, full life cycle protection of security verification-installation-key refreshing in the vehicle-mounted instrument firmware updating process is realized, and the anti-attack ability and updating efficiency of the system are improved.