基于陷门搜索的条件代理重加密方案

基于陷门搜索的条件代理重加密方案 A Conditional Proxy Re-encryption Scheme Based on Trapdoor Search 王淑娥 WANG Shue 1 2 first-author 林柏钢 LIN Bogang 1 2 福州大学数学与计算机科学学院 福州大学数学与计算机科学学院 College of Mathematics and Computer Science,Fuzhou University College of Mathematics and Computer Science,Fuzhou University 网络系统信息安全福建省高校重点实验室 网络系统信息安全福建省高校重点实验室 Key Laboratory of Information Security of Network System,Fuzhou University Key Laboratory of Information Security of Network System,Fuzhou University 为实现对数据细粒度且可扩展的访问控制,通过引入陷门搜索实现快速的条件匹配,提出一个高效的、可用于多条件以及"与"和"或"的复杂组合条件的代理重加密方案,较大地提高了条件代理重加密的效率,可实现高效的按需授权和撤销操作以满足用户对数据的细粒度访问控制需求.同时还引入强一次性签名算法以保证加密过程的安全性,最后在随机预言机模型下证明其在3-QDBDH假设下可抵抗选择密文攻击. To achieve fine-grained and scalable data access control for data,by introducing fast search trapdoor matching conditions,we propose an efficient conditional proxy re-encryption scheme which can solve multiple conditions and"and"and"or"complex combination of conditions’ scenario,thus it can greatly improve the efficiency of the program and achieve efficient on-demand license and revocation to meet the demand of users’ fine-grained access control to data.The program also introduces a strong one-time signature algorithm to ensure the security of the encryption process.Finally,we prove that it can be against the chosen cipher-text attack（CCA）under 3-QDBDH assumption in the random oracle model which show the security of our proposed scheme. 条件代理重加密 强一次性签名 陷门搜索 细粒度访问控制 云计算 conditional proxy re-encryption a strong one-time signature algorithm search trapdoor fine-grained access control cloud computing 10.14188/j.1671-8836.2014.06.009 TN918.4 国家自然科学基金（61075022）;福建省科技厅重点项目资助项目（2012H0025） 2014-06-01 2021-04-01 6 60