Cryptology ePrint Archive: BibTeX Citation of Report 2003/109

@misc{cryptoeprint:2003:109,
    author = {Alex Biryukov and Christophe De Canni\`ere and Gustaf Dellkrantz},
    title = {Crytanalysis of SAFER++},
    howpublished = {Cryptology ePrint Archive, Report 2003/109},
    year = {2003},
    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.