Abstract:
The research of access control based on attribute encryption has been implemented in cloud storage, which is mostly based on single authorization center, may result in the leakage of key.Proposing a CP-ABE design of a multi access control scheme based on reference proxy server (Proxy Server, PS), to help users to undertake a large number of decryption operation; Problems with high security attributes revocation algorithm for processing; Finally, using the bilinear decision (Decision Bilinear Diffie-Hellman, DBDH) proved to be the chosen plaintext attack security.