Cryptology ePrint Archive: Report 2004/307

Universal Forgeability of Wang-Wu-Wang Key-Insulated Signature Scheme

Zhengjun Cao

Abstract: Wang et al. recently proposed a new perfect and strong key-insulated signature scheme in [1]. We find that the scheme is universally forgeable. In the paper we present a simple and direct attack on it.

Category / Keywords: cryptographic protocols / key-insulated signature scheme,universal forgeability

Date: received 15 Nov 2004

Contact author: zjcamss at hotmail com

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Version: 20041116:084034 (All versions of this report)

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