33results about How to "Encryption guaranteed" patented technology

The present invention provides a data communication method, device and vehicle for a vehicle-mounted bus. The data communication method includes: a sender sends a message, the message includes application data and control domain data, and the control domain data includes a message count value and / or Or the CRC value of the sender, the message count value is added 1 before the message is sent, and the CRC value of the sender is calculated based on the application data and the data identifier value pre-stored by the sender, and the data identifier value is used for Uniquely identifies the message; the receiving end receives the message and judges the continuity of data communication according to the message count value, and calculates the CRC value of the receiving end according to the application data and the data identification value pre-stored by the receiving end. The cyclic redundancy check value and the cyclic redundancy check value of the receiving end judge the encryption and integrity of the data communication. The data communication method, device and vehicle of the in-vehicle bus of the present invention can ensure the continuity, integrity and encryption of end-to-end data communication.

The invention discloses a method for uploading a blockchain to prevent data tampering. The method includes the following steps: S1, the hardware system on the chain and the blockchain node perform mutual identity verification to complete the initial identity authentication; S2, the hardware system on the chain Obtain key data from the service device through the data acquisition hardware interface, and perform identity signature and encryption on the key data; S3, the on-chain hardware system obtains the associated data from the communication device through the near field communication module, and performs identity signature and encryption on the associated data; S4. The on-chain hardware system packages the key data and associated data, signs and encrypts the packaged data and sends it to the blockchain node to complete the data on-chain. The method of the invention ensures that the key data is directly linked on the blockchain node through the checksum protection mechanism of the on-chain hardware system before going on the chain, avoids the risk of malicious modification of the data before going on the blockchain through other business platforms, and guarantees Integrity and encryption of on-chain data.

The invention provides a whole vehicle network system for hydrogen energy vehicles, including a gateway controller, a vehicle brake module, a vehicle management module and an on-board automatic diagnosis system, wherein the gateway controller includes a first CAN network, a second CAN network, a third CAN network, and a third CAN network. The CAN network, the fourth CAN network, the first gateway encryption module and the second gateway encryption module, the input end of the first gateway encryption module is electrically connected to the first CAN network, and the output end of the first gateway encryption module is connected to the first gateway encryption module. The three CAN networks are electrically connected, the input terminal of the second gateway encryption module is electrically connected to the second CAN network, the output terminal of the second gateway encryption module is electrically connected to the fourth CAN network, and the vehicle brake module is electrically connected to the third CAN network. A CAN network is electrically connected, the vehicle management module is electrically connected to the second CAN network, the vehicle-mounted automatic diagnosis system includes a sixth CAN network and a seventh CAN network, the sixth CAN network is electrically connected to the third CAN network, The seventh CAN network is electrically connected to the fourth CAN network.

The invention relates to an underwater communication device with encryption and decryption capabilities, a transmitter and a receiver, including a transmitting unit and a receiving unit, and the transmitting unit includes a sequentially connected first A / D conversion module, a cepstrum encryption module, a modulation module, a first D / A conversion module and a transmitting transducer; the receiving unit includes a receiving transducer connected in sequence, a signal conditioning circuit, a second A / D conversion module, a demodulation circuit, a cepstrum decryption module and a first Two D / A conversion modules. The invention can effectively realize underwater analog communication encryption.