Cryptology ePrint Archive: BibTeX Citation of Report 2011/676

@misc{cryptoeprint:2011:676,
    author = {Jian-Zhu Lu, Shaoyuan Zhang, Shijie Qie},
    title = {Enhanced Biometrics-based Remote User Authentication Scheme Using Smart Cards},
    howpublished = {Cryptology ePrint Archive, Report 2011/676},
    year = {2011},
    note = {\url{http://eprint.iacr.org/}},
}

You will need the url.sty package (comes with most LaTeX installations) for the last line. Otherwise, remove the \url command.