多用户关键词合取密文搜索方案  

Multi-user Conjunctive Keyword Search Scheme over Ciphertext

作　　者：伍琦[1] 万常选[1] 

机构地区：[1]江西财经大学信息管理学院,南昌330013

出　　处：《计算机科学》2013年第9期147-151,173,共6页Computer Science

基　　金：国家自然科学基金(61163053);江西省教育厅科学技术研究项目(GJJ11730)资助

摘　　要：随着云计算下数据外包的流行,可搜索加密的重要性日益凸显。针对Yang等提出的多用户关键词合取搜索方案中,用户必须给全所有关键词值这一局限,设计了一个改进方案。随后,详细分析了新方案的正确性、安全性及运行效率。分析表明,新方案在维持原方案安全性的基础上,实现了用户仅需提交部分关键词这一实用功能。新方案运行效率出色,在云计算"瘦客户机"应用背景下有一定的实践价值。最后附带给出了新方案的一个简易实现。Searchable encryption becomes increasingly significant with the prevalence of data outsourcing in cloud com- puting. To overcome the flaw in Yang et al. ＇s scheme that users have to provide all keywords, an improved one was proposed in this paper. The correctness, security and performance of the proposed scheme were analyzed in detail. It shows that the new scheme maintains the security properties of Yang et al. ＇s scheme but allows users to provide part of keywords. The new scheme performs well in terms of computational complexity, and can be applied to cloud computing where ＂thin client＂ is demanded. At last,a simple implementation of the new scheme was given.

关 键 词：云计算 可搜索加密 关键词合取搜索 

分 类 号：TN918.1[电子电信—通信与信息系统]