Symmetric searchable encryption scheme that supports phrase search

Abstract

The symmetric searchable encryption (SSE) scheme not only guarantees the privacy and security of cloud data, but also enables users to achieve fast search. However, the functions of the existing SSE scheme are not very perfect, for example, the phrase search cannot be effectively implemented. In order to solve the problem, this paper proposes an SSE scheme that can effectively support phrase search by means of the scheme of Cash et al. and proves that the scheme satisfies IND-CKA2 under the selected keywords through security analysis, and the search efficiency of the scheme can reach sub-linear levels.