@misc{cryptoeprint:2013:380,
    author = {Yalin Chen 1, *Jue-Sam Chou2, Wen-Yi Tsai 3},
    title = {Comments on Three Multi-Server Authentication Protocols},
    howpublished = {Cryptology ePrint Archive, Report 2013/380},
    year = {2013},
    url = {https://eprint.iacr.org/2013/380},
}