Cryptology ePrint Archive: Report 2004/262
Universal Forgeability of a Forward-Secure Blind Signature Scheme Proposed by Duc et al.
Lihua Liu and Zhengjun Cao
Abstract: Duc et al. proposed a forward-secure blind signature scheme
in . They claimed that the scheme is constructed from the
provably secure Okamoto-Guilou-Quisquater blind signature
scheme. But we recently found that their scheme is insecure.
In the paper, we show the scheme is universally forgeable by
a simple and direct attack.
Category / Keywords: cryptographic protocols / Blind signature, Universal forgeability.
Date: received 13 Oct 2004
Contact author: zjcamss at hotmail com
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Version: 20041014:103911 (All versions of this report)
Short URL: ia.cr/2004/262
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