An Efficient and More Secure Searchable Encryption Algorithm Based On Fully Homomorphic Encryption

The increased use of cloud service platforms (CSP) has led to a growing need for private information retrieval (PIR) methods and searchable encryption (SE) methods. This under-scores the importance of securing clients’ private information while using CSP services. In this paper, we set more stringent goals for searchable encryption (SE) than prior work. We then present an index-based searchable encryption scheme using fully homomorphic encryption, which can be used in conjunction with the services provided by CSPs. Our scheme has a low calculation complexity under certain conditions (when the total number of queried files is small). Our scheme enables data inquirers to search their desired private information while preserving their privacy and keeping them from being frequency analysis attack.