Cryptology ePrint Archive: BibTeX Citation of Report 2008/083

@misc{cryptoeprint:2008:083,
    author = {Hung-Min Sun, Wei-Chih Ting, and King-Hang Wang},
    title = {On the Security of Chien's Ultralightweight RFID Authentication Protocol},
    howpublished = {Cryptology ePrint Archive, Report 2008/083},
    year = {2008},
    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.