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Tinu Baby and Aswani Kumar Cherukuri On query execution over encrypted data Security and Communication Networks 8

Version of Record online: 12 MAR 2014 | DOI: 10.1002/sec.982

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This paper proposes a framework for improving the performance of different query operations, that is, non-aggregate, aggregate and user-defined query operations, on encrypted data in Database-as-a-Service model. The performance of these query operations over the encrypted data is compared with that of the available methods, in terms of the execution time, and it is found that the efficiency of the proposed approach is better than that of the traditional approach. Effectiveness of different types of non-aggregate query operations is identified in terms of filter ratio and false ratio. The analysis has shown that the filter ratio increases and the false ratio decreases with an increase in the size of sensitive string and the reachability matrix generated for the non-aggregate attribute.

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