期刊论文

Attribute-based Proxy Re-encryption Technology and Fault-tolerant Mechanism Based Data Retrieval Scheme

中文

计算机科学

1002-137X

2018

45

7

162-166,196

10.11896/j.issn.1002-137X.2018.07.028

国家自然科学基金资助项目（61572174） 湖南省教育厅资助科研项目（15A029）基金资助

本校为第一机构

针对云服务器上用户信息的隐私问题,提出一种基于属性代理重加密技术与容错机制相结合的方案。该方案将用户存储的数据分为文件和文件的安全索引,将其分别进行加密后存储在不同的云服务器上。首先,利用倒排序结构构造文件的安全索引,并使用模糊提取器对关键字进行预处理,用户可以通过该安全索引进行容错的多关键字搜索;其次,设置访问控制树对解密密钥重加密,实现权限管理,即实现数据在云端的有效共享;最后,通过Complex Triple Diffle-Hellman难题证明该方案生成的系统主密钥是安全的,因此该方案在云环境下也是安全的。与已有的方案的对比分析表明,该方案可减少密钥重加密、解密等的计算量,同时通...

Aiming at the privacy of user information stored in the cloud server problem,a scheme based on property broker re-encryption and fault-tolerant mechanism was proposed.This scheme mainly divides the data stored by users into files and the security index of files,encrypts them separately and then stores them on different cloud servers.Firstly,the security index of file is constructed by using the inverted structure and the keywords are preprocessed by using the fuzzy extractor,so the users can search multi-keywords with fault tolerance through the security index.Secondly,the access control tree ...