@misc{cryptoeprint:2004:307,
    author = {Zhengjun Cao},
    title = {Universal Forgeability of Wang-Wu-Wang Key-Insulated Signature Scheme},
    howpublished = {Cryptology ePrint Archive, Report 2004/307},
    year = {2004},
    url = {http://eprint.iacr.org/2004/307},
}