对称可搜索加密的安全性研究进展

为节约本地存储空间以及管理开销,文件可通过云存储服务被上传到云服务器.云存储服务作为一项重要的云技术已得到了广泛的研究和应用.文件以明文的形式存储显然无法满足隐私保护和安全需求,但若以传统的加密方式将加密后的文件上传服务器又使服务器失去检索原文件的能力.可搜索加密(Searchable Encryption,SE)是近...

A Survey on Security Development of Searchable Symmetric Encryption

To save local storage space and management overhead, now files can be uploaded to cloud servers. As an important cloud technology, cloud storage service has been widely researched and applied. The storage of files in plaintext obviously cannot meet the privacy and security requirements. However, if the encrypted files are uploaded to the server by traditional encryption, the server will lose the ability to search them by keywords. Searchable encryption (SE) is a cryptographic primitive developed in recent years that supports clients to perform keyword search on ciphertext. By searchable encryption, clients can encrypt the files and uploads them to the cloud server and then retrieve them by keywords, which is convenient for clients and protects the privacy of the files. This paper introduces the basic concepts of SE. Starting from the construction method of symmetric searchable encryption, we summarize the research results about security of existing symmetric searchable encryption. We focus on the development process of the adaptive security model of symmetric searchable encryption, and analyze inference attacks, file-injection attacks, new security models and countermeasures. Then we point out the main problems currently facing the security research of SE and the future direction.