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Universal Forgeability of Wang-Wu-Wang Key-Insulated Signature Scheme
key-insulated signature scheme universal forgeability
2009/4/1
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....
Universal Forgeability of a Forward-Secure Blind Signature Scheme Proposed by Duc et al.
Blind signature Universal forgeability
2009/3/31
Duc et al. proposed a forward-secure blind signature scheme in
[1]. They claimed that the scheme is constructed from the provably secure Okamoto-
Guilou-Quisquater blind signature scheme. But we rec...