An Efficient Scheme of Multi-user Searchable Encryption with Keyword in Cloud Storage

Abstract

Cloud storage services allow the users to outsource their data to the cloud storage servers to reduce management costs. The cloud servers cannot be fully trusted while those data may contain sensitive personal information. We study a problem of storing and retrieving private data encrypted in a cloud. Multi-user searchable encryption is a promising way to keep user's data confidential against un-trusted cloud service provider and allow users to share their data in privacy. In this paper we propose an efficient, secure and privacy preserving keyword search scheme which supports multiple users with more flexible key management and lower computation cost rather than known approaches.