@misc{cryptoeprint:2009:561,
    author = {Yalin Chen1, Jue-Sam Chou2,* , Chun-Hui Huang3},
    title = {Improvements on two password-based authentication protocols},
    howpublished = {Cryptology ePrint Archive, Report 2009/561},
    year = {2009},
    url = {http://eprint.iacr.org/2009/561},
}