云服务器中基于同态加密的关键词检索方案  

Keywords Retrieval Based on Homomorphic Encryption in Cloud Server

作　　者：刘家森 王绪安[1] 王涵 赵凯洋 闫纪宁 LIU Jia-sen;WANG Xu-an;WANG Han;ZHAO Kai-yang;YAN Ji-ning(Key Laboratory for Network and Information Security of the PAP,Engineering University of the PAP,Xi’an 710086,China)

机构地区：[1]武警工程大学网络与信息安全武警部队重点实验室,西安710086

出　　处：《科学技术与工程》2021年第8期3180-3185,共6页Science Technology and Engineering

基　　金：国家重点研发计划(2017YFB0808000);陕西省自然科学基础研究计划(2018JM6028);国家自然科学基金(61772550,U1636114,61572521);国家密码发展基金(MMJJ20170112)。

摘　　要：针对云服务器中海量密文文件的存储与检索需求,基于错误学习(learning with errors,LWE)问题以及近似最大公约数(approximate greatest common divisor,AGCD)问题设计一种新型同态加密方案,并通过建立加密关键词索引提出了新的检索方案。安全性分析与实验测试表明,方案可有效保护用户数据在存储与检索阶段的隐私,与传统的密文检索方案相比,具有较高的检索效率及准确性。For the storage and retrieval requirements of massive cryptographic files in cloud server,a new homomorphic encryption scheme was designed based on learning with errors and approximate maximum common divisor,and a new retrieval scheme was proposed by establishing encrypted keyword indexing.Security analysis and experimental show that the proposed scheme can effectively protect the privacy of user data in the storage and retrieval stages.Compared with the traditional ciphertext retrieval scheme,the scheme has higher retrieval efficiency and accuracy.

关 键 词：同态加密 密文检索 错误学习 近似最大公约数(AGCD) 

分 类 号：TP391.3[自动化与计算机技术—计算机应用技术]