Cryptology ePrint Archive: BibTeX Citation of Report 2012/107

@misc{cryptoeprint:2012:107,
    author = {Guilin Wang and Jiangshan Yu and Qi Xie},
    title = {Security Analysis of A Single Sign-On Mechanism for Distributed Computer Networks},
    howpublished = {Cryptology ePrint Archive, Report 2012/107},
    year = {2012},
    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.