@misc{cryptoeprint:2004:262,
    author = {Lihua Liu  and  Zhengjun Cao},
    title = {Universal Forgeability of a Forward-Secure  Blind Signature Scheme Proposed by   Duc et al.},
    howpublished = {Cryptology ePrint Archive, Report 2004/262},
    year = {2004},
    url = {http://eprint.iacr.org/2004/262},
}