可搜索加密研究进展综述

随着云计算的迅速发展，为保护用户外包数据的安全和用户隐私，越来越多的企业和用户选择将数据加密后上传。因此，对云服务器上加密数据的有效搜索成为用户关注的重点。可搜索加密技术是允许用户对密文数据进行检索的密码原语，利用云服务器的强大计算资源进行关键词检索。根据使用密码体制的不同，介绍了可搜索加密的分类，将其分为对称可搜索加密和非对称可搜索加密。基于这种分类，首先介绍了典型方案，之后从可搜索加密的语句表达能力和安全性2方面进行介绍，并指出了该领域当前研究中急需解决的问题及未来研究方向。

Overview of searchable encryption research

With the development of cloud computing,there is an increasing number of companies and individuals outsourcing their data to cloud server in the encrypted form to protect data security and user privacy.As a result,efficient retrieval of encrypted data stored on cloud server has become the issue that users may pay attention to.Searchable encryption (SE) is a cryptographic primitive that supports keyword search over encrypted data,and migrates the cumbersome search operation to the cloud server to utilize its vast computational resources.Reviews previous research according to the different cryptosystems used,and divides SE into two groups,that is symmetric searchable encryption and asymmetric searchable encryption.Based on this classification,first introduces a typical program,and then introduces from the two aspects of the expression of searchable encryption and security.Finally,the need-to-be-solved problems and main research directions are discussed.