46results about How to "Less fairness" patented technology

The invention relates to an identity-based anonymous authentication method and system. The method comprises the following steps: a server generates two partial private keys and sends the same to double parties P1 and P2 participating in the authentication respectively, wherein P1 and P2 generate a main authentication code (the formula is described in the specification) and R in an authentication process, and the privacy and reliability of the interactive information between P1 and P2 are ensured by using zero knowledge proof; after the P1 obtains the main authentication code, the P1 generatesa pseudo-address AID, generates a third temporary public key R3, calculates a final authentication code alpha, and sends the authentication information (AID, R, R3, alpha, T) the server, and the server verifies the authentication information and feeds back the authentication information to a user, after the successful completion of three times of handshake, the server can establish secure communication with the user. The identity-based anonymous authentication method and system are suitable for jointly completing identity-based distributed anonymous authentication without exposing the respective partial authentication private keys of the both parties together, the both parties holding the partial private keys must participate in the authentication at the same time, and the complete authentication private key does not need to be restored.

The invention relates to a RSA digital signature generation method and a RSA digital signature generation system based on an identity. The method specifically comprises the steps as follows: a secretkey generation center generates a public and secret key pair of a pair of RAS and a pair of random numbers; one part of a signature secret key is sent to P1, and the other part of signature secret keyis sent to P2; the two parties P1 and P2 participating into generation of a digital signature separately generate a random number r1 and a random number r2; the P1 firstly computes r1, encrypts the r1 to acquire C1, and then sends the C1 and r1 to the P2; the P2 computes r2 and returns the same to the P1; meanwhile, the P2 a ciphertext C2; the P2 sends the ciphertext C2 to the P1; And the P1 decrypts the C2, and computes to acquire signatures S and R by using one part of own signature secret key, and after the signatures pass authentication, the P1 publishes the complete RAS digital signature(R, S) based on the identity. According to the method and the system provided by the invention, security of the signature secret key is ensured, and the fairness of the two parties participating intothe digital signature is improved.