@misc{cryptoeprint:2006:462,
    author = {Lei Duo and Chao Li},
    title = {Improved Collision and Preimage Resistance Bounds on PGV Schemes},
    howpublished = {Cryptology ePrint Archive, Report 2006/462},
    year = {2006},
    url = {http://eprint.iacr.org/2006/462},
}