支持策略检索的属性基可搜索加密方案

Attribute-based searchable encryption scheme supporting strategy retrieval

为解决现有属性基可搜索加密方案仅支持单关键词检索或联合多关键词检索的问题,提升用户检索的灵活性,提出一种支持策略检索的属性基可搜索加密方案。使用LSSS(linear secret sharing schemes)技术构造用户检索陷门,支持任意单调布尔公式表示的搜索策略。结合属性加密实现对密文细粒度的访问控制。通过与现有方案进行计算和存储效率的对比分析,并进行实验仿真,结果表明,提出的方案在效率和安全性方面均有显著提升。

To solve the problem that the existing attribute-based searchable encryption scheme only supports single-keyword retrieval or joint multi-keyword retrieval,and to improve the flexibility of user retrieval,an attribute-based searchable encryption scheme supporting strategy retrieval was proposed.The LSSS(linear secret sharing schemes)technology was used to construct user retrieval trapdoors and support any search strategy expressed by monotone Boolean formula.Combined with the attribute encryption,fine-grained access control to ciphertext was realized.Through the comparative analysis of computing and storage efficiency of the proposed method with that of existing schemes,results indicate that the proposed scheme is significantly improved in terms of the efficiency and security.