可密钥验证的多授权属性基加密方案  

MULTI-AUTHORIZATION ATTRIBUTE-BASED ENCRYPTION WITH KEY VERIFICATION

作　　者：杨诗雨[1] 李学俊[1] 

机构地区：[1]西安电子科技大学网络与信息安全学院,陕西西安710071

出　　处：《计算机应用与软件》2017年第5期311-316,共6页Computer Applications and Software

摘　　要：在多授权属性基加密方案中,每个授权机构都会给用户发一个私钥,当用户拿到所有的私钥但不能成功解密时,就不知道是哪个授权机构对应得私钥出错,所以只能要求所有的授权机构重发一次,这样既浪费时间又浪费资源。为了解决上述问题,提出了一种可密钥验证的多授权基于属性的加密方案,实现了在矩阵访问结构下对私钥的正确性进行验证,解决了当合法用户不能成功解密时需要大量的授权机构重发私钥的问题。同时实现了抗共谋攻击,提高了系统的安全性。最后证明了该方案在selective-set模型下达到选择明文攻击安全。In the multi-authorization attribute-based encryption scheme,each authority will send a private key to the user. When the user to get all the private key but can not be successfully decrypted,the authority does not know which is the corresponding private key error,it can only ask all authorized agencies to re-send time,so that a waste of time and waste of resources. In order to solve the above problems,a multi-authorization attribute-based encryption scheme with key verification is proposed. This method can verify the correctness of the private key under the matrix access structure,and solves the problem that a large number of authorized institutions need to retransmit the private key when the legitimate user can not decrypt successfully. At the same time,it realizes the anti-collusion attack and improves the security of the system. Finally,it is proved that the proposed scheme achieves the security of selective plaintext attack in the selective-set model.

关 键 词：多授权 属性基加密 密钥验证 抗共谋攻击 

分 类 号：TP309.2[自动化与计算机技术—计算机系统结构]