Secure Conjunctive Multi-Keyword Search for Multiple Data Owners in Cloud Computing

Abstract

Recently, secure search over encrypted cloud data has become a hot research spot and challenging task. Some secure search schemes have been proposed to try to meet this challenge. In this paper, we propose a conjunctive multi-keyword secure search scheme for multiple data owners. To guarantee data security and system flexibility in the multiple data owners environment, we design an ingenious secure query scheme that allows each data owner to adopt randomly chosen temporary keys to build secure indexes for different data files. An authorized data user does not need to know these temporary keys of constructing indexes and can instead randomly choose another temporary query keys to encrypt query keywords while the cloud can correctly perform keywords matching over encrypted data files. Extensive experiments demonstrate the correctness and practicality of the proposed scheme.