Cryptology ePrint Archive: Report 2017/676

Dynamic Verifiable Encrypted Keyword Search Using Bitmap Index and Homomorphic MAC

Rajkumar Ramasamy and S.Sree Vivek and Praveen George and Bharat S. Rawal Kshatriya

Abstract: Outsourcing data storage to the cloud securely and retrieving the remote data in an efficient way is a very significant research topic, with high relevance to secure cloud deployment. With the ever growing security and privacy concerns, encrypting the data stored remotely is inevitable but using traditional encryption thwarts performing search operation on the encrypted data. Encrypted keyword search is a cryptographic setting, which offers search functionality and at the same time, ensures security and privacy of the remotely stored data.

Searchable Symmetric Encryption (SSE) is a technique to securely outsource the data, which is encrypted using symmetric key primitives, while maintaining search functionality. While several solutions have been proposed to realize SSE over various data structures, the efficient solution using inverted index is due to Curtmola et.al. Hwang et.al. introduced a SSE scheme based on bitmaps in-order to reduce the index size.

In this paper, we consider Searchable Symmetric Encryption (SSE) in the presence of a Semi-Honest-But-Curious Cloud Service Provider (SHBC-CSP). We have defined a new security notion for SSE in presence of SHBC-CSP, contrived two new SSE schemes and proved their security formally in the proposed security notion. Dynamic Verifiable Encrypted Keyword Search (DVSSE), is the first SSE scheme to the best of our knowledge, which is both dynamic and verifiable. We have implemented our schemes, compared their performance and complexity with existing schemes.

Category / Keywords: Encrypted Keyword Search, Searchable Encryption, Random Oracle Model

Date: received 5 Jul 2017, last revised 11 Jul 2017

Contact author: rraj be at gmail com

Available format(s): PDF | BibTeX Citation

Version: 20170712:114759 (All versions of this report)

Short URL: ia.cr/2017/676

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