Cryptology ePrint Archive: BibTeX Citation of Report 2008/451

@misc{cryptoeprint:2008:451,
    author = {Mohamed Saied Emam Mohamed and Jintai Ding and Johannes Buchmann},
    title = {Algebraic Cryptanalysis of MQQ Public Key Cryptosystem by MutantXL},
    howpublished = {Cryptology ePrint Archive, Report 2008/451},
    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.