Cryptology ePrint Archive: BibTeX Citation of Report 2005/327

@misc{cryptoeprint:2005:327,
    author = {Jongsung Kim and Alex Biryukov and Bart Preneel and Sangjin Lee},
    title = {On the Security of Encryption Modes of MD4, MD5 and HAVAL},
    howpublished = {Cryptology ePrint Archive, Report 2005/327},
    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.