格上基于身份的可问责代理重加密方案.

Aiming at the problems of key abuse and digital certificate management in the current lattice-based proxy re-en-cryption scheme, this paper proposed a new identity-based accountable proxy re-encryption scheme by introducing the account-ability algorithm. This scheme used the user ID to calculate matrix as the public key and used the pre-image sampling algo-rithm to extract the private key, which solved the problem of digital certificate management. It used the public keys of both us-ers to calculate and generate the re-encryption key, which improved the computational efficiency of encryption and decryption. It used the proxy's public and private keys to participate in the re-encryption calculation, completed the accountability algo-rithm, and inhibited the collusion of the proxy and the delegate. The security analysis shows that the scheme satisfies the cho-sen-plaintext attack security. In terms of efficiency, the scheme has less computational complexity and ciphertext overhead. [ABSTRACT FROM AUTHOR]