Verifiable ranked search over encrypted data with forward and backward privacy

摘要

The more growing discovery of cloud computing capabilities, the more likely researchers are to make progress in this field. The ability to search over the encrypted data is one of the prerequisites for cloud computing. A large number of data owners all over the world are interested in outsourcing data to the cloud, being concerned about protecting the data privacy. The method presented in this paper includes several functionalities which have never been simultaneously available in any other searchable encryption scheme. The proposed scheme is a dynamic scheme in which data update does not leak information from outsourced data or search keywords. In this model, the cloud server is assumed to be malicious and in such circumstances it is possible to verify the search results by data user. In addition to searching with multiple keywords, the user receives the ranked search results as well. The performance analysis of proposed scheme shows that despite the added functionality, its efficiency is reasonable. (C) 2019 Elsevier B.V. All rights reserved.