2results about How to "Easy to decrypt" patented technology

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.