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An efficient secure comparison protocol

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2 Author(s)
Zhenmin Lin ; Dept. of Comput. Sci., Univ. of Kentucky, Lexington, KY, USA ; Jaromczyk, J.W.

We propose a new efficient cryptography-based secure comparison protocol for comparing secrets that are additively split between two parties. Our solution, based on homomorphic cryptosystems, needs 2N + 6 invocations of secure multiplications when the two secrets are numbers in the range [0; 2N); previous solutions required 12N + O(1) secure multiplications. The protocol provides substantial performance improvement in privacy preserving data mining protocols that use comparison as a primitive operation. In particular, we experimentally evaluate the performance of our secure comparison protocol in the implementation of a secure k-means clustering protocol applied to several real datasets.

Published in:

Intelligence and Security Informatics (ISI), 2012 IEEE International Conference on

Date of Conference:

11-14 June 2012

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