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Flexible Wildcard Searchable Encryption System

机译:灵活的通配符可搜索的加密系统

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摘要

Searchable encryption is an important technique for public cloud storage service to provide user data confidentiality protection and at the same time allow users performing keyword search over their encrypted data. Previous schemes only deal with exact or fuzzy keyword search to correct some spelling errors. In this paper, we propose a new wildcard searchable encryption system to support wildcard keyword queries which has several highly desirable features. First, our system allows multiple keywords search in which any queried keyword may contain zero, one or two wildcards, and a wildcard may appear in any position of a keyword and represent any number of symbols. Second, it supports simultaneous search on multiple data owner's data using only one trapdoor. Third, it provides flexible user authorization and revocation to effectively manage search and decryption privileges. Fourth, it is constructed based on homomorphic encryption rather than Bloom filter and hence completely eliminates the false probability caused by Bloom filter. Finally, it achieves a high level of privacy protection since matching results are unknown to the cloud server in the test phase. The proposed system is thoroughly analyzed and is proved secure. Extensive experimental results indicate that our system is efficient compared with other existing wildcard searchable encryption schemes in the public key setting.
机译:可搜索的加密是公共云存储服务提供用户数据机密性保护的重要技术,同时允许用户在加密数据上执行关键字搜索。以前的计划只处理精确或模糊关键字搜索,以纠正一些拼写错误。在本文中,我们提出了一个新的通配符可搜索的加密系统,以支持具有多个非常理想的功能的通配符关键字查询。首先,我们的系统允许多个关键字搜索,其中任何查询的关键字可能包含零,一个或两个通配符,并且通配符可能出现在关键字的任何位置,并且代表任何数量的符号。其次,它支持同时使用一个Trapdoor同时搜索多个数据所有者的数据。第三,它提供灵活的用户授权和撤销,以有效地管理搜索和解密权限。第四,基于同型加密而不是盛开的滤波器构建,因此完全消除了由绽放过滤器引起的假概率。最后,它实现了高水平的隐私保护,因为匹配结果在测试阶段中的云服务器未知。拟议的系统进行了彻底分析,被证明是安全的。广泛的实验结果表明,与公钥设置中的其他现有通配符可搜索的加密方案相比,我们的系统是有效的。

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