摘要
针对现有密文策略属性加密方案存在用户密钥易泄露的问题,提出一种基于安全三方计算协议的密文策略方案。通过属性授权中心、云数据存储中心及用户之间进行安全三方计算构建无代理密钥发布协议,使用户端拥有生成完整密钥所必需的子密钥。安全分析表明,该方案能够有效消除单密钥生成中心及用户密钥在传输给用户过程中易泄露所带来的威胁,增强用户密钥的安全性。
Aiming at the problem that the user key is easy to be leaked in the existing ciphertext policy attribute encryption scheme,a ciphertext policy scheme based on secure three-party computation protocol is proposed.By using Attribute Authorization center(AA),cloud Data Storage Center(DSC)and User,a secure three-party calculation is carried out to construct the proxy-free key publishing protocol,which enables the client to have the necessary subkeys to generate the complete key.The security analysis shows that this scheme can effectively eliminate the threat caused by the single secret key generation center and the easy leakage of the user key in the process of transmission to the user and enhance the security of the user key.
作者
谭跃生
鲁黎明
王静宇
TAN Yuesheng;LU Liming;WANG Jingyu(School of Information Engineering,Inner Mongolia University of Science and Technology,Baotou,Inner Mongolia 014010,China)
出处
《计算机工程》
CAS
CSCD
北大核心
2019年第1期115-120,128,共7页
Computer Engineering
基金
国家自然科学基金(61462069
61662056)
内蒙古自治区自然科学基金(2016MS0608
2016MS0609)
关键词
属性加密
信息安全
安全三方计算
访问控制
密文策略
attribute encryption
information security
secure three-party computation
access control
ciphertext policy
