2results about How to "Implement encryption protection" patented technology

The invention discloses a vehicle-mounted digital key system for traffic service, which relates to the technical field of vehicle-mounted digital keys and comprises a multi-body parallel chain module, a relay chain module, an authority core management module, an encryption storage module and a cross-chain communication adaptation module. According to the method, the traffic service subject-parallel chain mapping architecture is constructed, the multi-subject permission data is split into independent parallel chains, cross leakage of the permission data is avoided by utilizing physical isolation characteristics, the problem of high data security risk of an existing centralized architecture is solved, and the security risk of the existing centralized architecture is reduced through a Byzantine fault-tolerant verification mechanism of a relay chain. Cross-chain data synchronization and authority real-time verification are realized, consistency and timeliness of authority change during multi-subject switching are guaranteed, dynamic authority adaptation requirements in traffic services are met, accurate authority management and control and data encryption protection are realized through cooperation of an authority core management module and an encryption storage module which are dominated by a vehicle owner, and safety and reliability are improved. And illegal attacks and data tampering can be effectively resisted.

This application discloses a data transmission method, apparatus, computer device, and storage medium. The method includes: negotiating a key between a first device and each second device based on preset configuration parameters to generate a broadcast key and a content key between the first device and each second device; encrypting broadcast data using the broadcast key to generate encrypted broadcast data, and broadcasting the encrypted broadcast data; when connecting to a target second device that communicates with the first device based on the encrypted broadcast data, encrypting the content data using the content key to generate encrypted content data; sending the encrypted content data to the target second device and receiving the encrypted data processing result returned by the target second device based on the encrypted content data; and decrypting the encrypted data processing result using the content key to obtain the data processing result. By using the content key and broadcast key negotiated between the devices for encrypted data transmission, data security is ensured.