@misc{cryptoeprint:2006:200,
    author = {Guanfei Fang and Genxun huang},
    title = {Improvement of recently proposed Remote User Authentication Schemes},
    howpublished = {Cryptology ePrint Archive, Report 2006/200},
    year = {2006},
    url = {http://eprint.iacr.org/2006/200},
}