Cryptology ePrint Archive: BibTeX Citation of Report 2003/258

@misc{cryptoeprint:2003:258,
    author = {Marcin Rogawski},
    title = {Analysis of Implementation Hierocrypt-3 algorithm (and its comparison to Camellia algorithm) using ALTERA devices.},
    howpublished = {Cryptology ePrint Archive, Report 2003/258},
    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.