Cryptology ePrint Archive: Report 2009/319

Comments and Improvements on Chameleon Hashing Without Key Exposure Based on Factoring

Xiaofeng Chen and Haibo Tian and Fangguo Zhang

Abstract: In this paper, we present some security flaws of the key-exposure free chameleon hash scheme based on factoring \cite{GWX07}. Besides, we propose an improved chameleon hash scheme without key exposure based on factoring which enjoys all the desired security notions of chameleon hashing.

Category / Keywords: public-key cryptography /

Date: received 28 Jun 2009

Contact author: xfchen at xidian edu cn

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Version: 20090701:101039 (All versions of this report)

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