5results about How to "Easy to decrypt" patented technology

The present invention proposes a vehicle authentication method with privacy protection based on PUF, and the steps are as follows: system initialization: selecting an on-board unit OBU and an elliptic curve with a PUF function; communicating with a trust agency TA, the on-board unit OBU registers, and the roadside unit RSU registers; the vehicle user logs in to the on-board unit OBU; authentication between the on-board unit OBU of the vehicle and the roadside unit RSU: verifying the legitimacy of the on-board unit OBU through the authentication parameters of the on-board unit OBU, the PUF function and the PUF verification value and calculating the communication key I; authentication of the on-board unit OBU between vehicles: generating a temporary private key and a public key using a random number generation function and a base point, verifying the legitimacy of the vehicle through a secure hash function and authentication parameters and generating a communication key. The authentication of vehicles and vehicles and the authentication of vehicles and roadside RSUs of the present invention do not require the participation of the trust agency TA, and the reliability of authentication is guaranteed by using the PUF function and the elliptic curve.

The application discloses a kind of vehicle-road cloud homomorphic data aggregation method and system based on guardian area segmentation encoding mechanism.The method includes generating multiple prime Paillier key;Sensor data is preprocessed and unified bit width;Guardian area segmentation encoding is used, and guardian area is set in each data segment high bit, and encryption after splicing;When ciphertext aggregation, by center offset strategy and ciphertext multiplication, modular inverse operation, addition and subtraction homomorphic aggregation are realized, and carry and borrow cross-section propagation is inhibited.Aggregation result is decrypted after the combination of multiple prime structure and Chinese remainder theorem and Hensel promotion, and segmented decoding is carried out.The application reduces communication and calculation overhead, supports addition and subtraction aggregation, avoids data segment crosstalk, and is suitable for vehicle-road cloud collaborative privacy protection scene.

This invention discloses a method for applying for identity credentials, comprising: a wallet client sending an identity credential application request to a first operating institution; the first operating institution obtaining the public key of the corresponding wallet client from the identity chain based on the user's distributed identity identifier; verifying the signature information of the wallet client; generating an identity credential based on the private key of the first operating institution; generating a first-pass encrypted ciphertext based on the user's first identity information; and sending the identity credential and the first-pass encrypted ciphertext to the wallet client. This method ensures the security of identity information while reducing the need for secondary verification by the user, thus improving the user experience. Corresponding devices, electronic devices, and computer-readable media are also provided.

The present disclosure provides an attribution method, including: encrypting each identifier of a first device identifier set using the first private key to obtain a first encrypted identifier set; sending the first encrypted identifier set; receiving a second encrypted identifier set and a third encrypted identifier set; based on the encryption algorithm that satisfies the exchange characteristic, processing the second encrypted identifier set and the third encrypted identifier set to obtain a fourth encrypted identifier set; sending the fourth encrypted identifier set, so as to facilitate attribution based on the shared device identifier set obtained by decrypting the fourth encrypted identifier set. The present disclosure also provides an attribution device, a device, and a medium.