Cryptology ePrint Archive: Report 2012/157

Attack on Fully Homomorphic Encryption over the Integers

Gu Chunsheng

Abstract: This paper presents a heuristic attack on the fully homomorphic encryption over the integers by using lattice reduction algorithm. Our result shows that the FHE in [DGHV10] is not secure for some parameter settings. We also present an improvement scheme to avoid the lattice attack in this paper.

Category / Keywords: public-key cryptography / Fully Homomorphic Encryption, Cryptanalysis, Lattice Reduction

Date: received 2 Feb 2012, last revised 10 Feb 2012

Contact author: guchunsheng at gmail com

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Version: 20120323:202148 (All versions of this report)

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