一个高效的简易匿名属性基加密方案OA

Attribute-based encryption enables fine-grained access control over encrypted data and is applicable to various scenarios.This study focuses on the two key properties of practicality and anonymity.Specifically,practicality requires that the scheme has no restrictions on the size of the policy and attribute set,is simple in attribute representation,and satisfies adaptive security under standard assumptions;while anonymity emphasizes the protection of policy privacy.Nevertheless,existing schemes are difficult to balance practicality and anonymity simultaneously,and still face challenges in terms of efficiency.This study proposes an efficient anonymous attribute-based encryption scheme based on ciphertext strategy.Compared with Ka's Easy-ABE scheme,the proposed scheme removes key extraction functions,symmetric encryption,and message verification codes that are unrelated to security proofs achieving zero redundancy;In addition,the proposed scheme has been proven safe under the DBDH assumption.Compared with the FEASE scheme and FABESA scheme proposed by Meng et al.,the proposed scheme has more efficient encryption and decryption algorithms.Experimental analysis shows that the proposed solution has higher application value in practical environments.