Cryptology ePrint Archive: Report 2012/493

Efficient Query Integrity for Outsourced Dynamic Databases

Qingji Zheng, Shouhuai Xu, Giuseppe Ateniese

Abstract: As databases are increasingly outsourced to the cloud, data owners require various security assurances. This paper investigates one particular assurance, query integrity, by which a database querier (either the data owner or a third party) can verify that its queries were faithfully executed by the cloud server with respect to the outsourced database. Query integrity is investigated in the setting of dynamic databases, where the outsourced databases can be updated by the data owners as needed. We present a formal security definition of query integrity and a provably-secure efficient construction. Our solution improves upon the state-of-the-art solutions by additionally allowing aggregate queries and more flexible join queries. In addition, we provide better performance by eliminating a linear factor in the extra storage complexity for security purpose. Our solution also achieves a trade-off between computational and communication complexities.

Category / Keywords: cryptographic protocols / Dynamic outsourced database, query integrity, authenticated data structure

Publication Info: will be published in CCSW'2012

Date: received 27 Aug 2012

Contact author: qingjizheng at gmail com

Available format(s): PDF | BibTeX Citation

Version: 20120903:124721 (All versions of this report)

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