Cryptology ePrint Archive: BibTeX Citation of Report 2011/418

@misc{cryptoeprint:2011:418,
    author = {Jue-Sam Chou, Yalin Chen, Cheng-Lun Wu, Chi-Fong Lin},
    title = {An efficient RFID mutual authentication scheme based on ECC},
    howpublished = {Cryptology ePrint Archive, Report 2011/418},
    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.