[Resource Topic] 2012/561: An Attack on a Fully Homomorphic Encryption Scheme

Welcome to the resource topic for 2012/561

Title:
An Attack on a Fully Homomorphic Encryption Scheme

Authors: Hu Yupu, Wang Fenghe

Abstract:

In this paper we present an attack on a fully homomorphic encryption scheme on PKC2010. We construct a modi¯ed secret key, a modi¯ed decryption algorithm and a subset of the ciphertext space. When the ciphertext is from the subset, we can correctly decrypt it by our modi¯ed secret key and modi¯ed decryption algorithm. We also discuss when our modi¯ed decryption algorithm is e±cient, and when the subset is not negligible.

ePrint: https://eprint.iacr.org/2012/561

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