计算机科学 ›› 2021, Vol. 48 ›› Issue (5): 320-327.doi: 10.11896/jsjkx.200300160
季琰1, 戴华1,2, 姜莹莹1, 杨庚1,2, 易训3
JI Yan1, DAI Hua1,2, JIANG Ying-ying1, YANG Geng1,2, Yi Xun3
摘要： 随着云计算技术的迅猛发展,越来越多的企业和个人青睐使用私有云和公有云相结合的混合云环境,用于外包存储和管理其私有数据。为了保护外包数据的私密性,数据加密是一种常用的隐私保护手段,但这同时也使得针对加密数据的搜索成为一个具有挑战性的问题。文中提出了面向混合云的可并行的多关键词Top-k密文检索方案。该方案通过对文档、关键词分组进行向量化处理,并引入对称加密和同态矩阵加密机制,保护外包数据的私密性,同时支持多关键词密文检索;通过引入MapReduce计算模式,使得公有云和私有云合作完成的密文检索过程能够按照并行化方式执行,从而能够支持针对大规模加密数据的并行化检索。安全分析和实验结果表明,提出的检索方案能够保护外包数据的隐私,且其检索效率优于现有的同类方案。
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