Cryptology ePrint Archive: BibTeX Citation of Report 2005/165

@misc{cryptoeprint:2005:165,
    author = {Makoto Matsumoto and Takuji Nishimura and Mariko Hagita and Mutsuo Saito },
    title = {CRYPTOGRAPHIC MERSENNE TWISTER AND FUBUKI STREAM/BLOCK CIPHER },
    howpublished = {Cryptology ePrint Archive, Report 2005/165},
    year = {2005},
    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.