Publication Type

Journal Article

Publication Date

6-2017

Abstract

Searchable encryption (SE) is a promising technique which enables cloud users to conductsearch over encrypted cloud data in a privacy-preserving way, especially for the electronichealth record (EHR) system that contains plenty of medical history, diagnosis, radiologyimages, etc. In this paper, we focus on a more practical scenario, also named as theshared multi-owner settings, where each e-health record is co-owned by a fixed numberof parties. Although the existing SE schemes under the unshared multi-owner settingscan be adapted to this shared scenario, these schemes have to build multiple indexes,which definitely incur higher computational overhead. To save bandwidth and computingresources in cloud servers and guarantee the correctness of search results, we present asecure cryptographic primitive, namely verifiable conjunctive keyword search over mobilee-health cloud scheme, in the shared multi-owner settings by utilizing multisignaturestechnique. Formal security analysis proves that our scheme is secure against the keywordguessing attacks in standard model. Empirical study using a real-world dataset justifies thatour scheme is efficient and feasible in practical applications.

Keywords

Searchable encryption, Multi-owner settings, Conjunctive keyword, Correctness, Keyword guessing attacks

Discipline

OS and Networks | Programming Languages and Compilers

Publication

Pervasive and Mobile Computing

Volume

40

First Page

205

Last Page

219

ISSN

1574-1192

Identifier

10.1016/j.pmcj.2017.06.016

Publisher

Elsevier

Creative Commons License

Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License.

Additional URL

http://doi.org./10.1016/j.pmcj.2017.06.016

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