基于全同态加密的可证数据持有方案  

Provable Data Possession Scheme Based on Fully Homomorphic Encryption

作　　者：李少鲲 曹峰[3] 

机构地区：[1]信息工程大学 [2]数学工程与先进计算国家重点实验室 [3]95879部队

出　　处：《信息工程大学学报》2015年第3期274-280,共7页Journal of Information Engineering University

摘　　要：在使用全同态加密保护数据安全与隐私的云存储服务中,全同态加密体制密文扩张率大的特点将严重影响远程数据完整性验证的效率。基于全同态加密体制,提出一种带有数据快速还原功能的高效可证数据持有方案。使用具备全同态属性的标签结构,结合云计算中计算外包的思想,将计算和存储开销由用户转移至服务器,同时借助密文同态属性减小交互过程中的通信开销。分析与比较表明,在使用全同态体制进行数据加密的云存储服务中,新方案与原有方案相比,具有明显的效率优势。The fully homomorphic encryption （FHE） schemes share a common flaw, which is the large scales of the cipher for each message. This flaw makes it inefficient to verify the integrity of da- ta which is stored by the cloud storage service. An efficient provable data possession scheme is pres- ented on the base of FHE, with the function of recovering the users＇ data directly. The scheme uses fully homomorphic tags, and includes the idea of computation outsourcing. The computation and storage load is transferred to the cloud servers, and the communication load is reduced by the homo- morphic property of FHE. The comparison and analysis indicate that comparing with the former ones, the presented scheme has the obvious advantage of efficiency in the application of cloud stor- age service with FHE.

关 键 词：可证数据持有 全同态加密 全同态标签 

分 类 号：TN918.1[电子电信—通信与信息系统]