Cryptology ePrint Archive: BibTeX Citation of Report 2007/224

@misc{cryptoeprint:2007:224,
    author = {*Jue-Sam Chou 1, Guey-Chuen Lee 2, Chung-Ju Chan 3},
    title = {A Novel Mutual Authentication Scheme Based on Quadratic Residues for RFID Systems},
    howpublished = {Cryptology ePrint Archive, Report 2007/224},
    year = {2007},
    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.