Cryptology ePrint Archive: BibTeX Citation of Report 2003/203

@misc{cryptoeprint:2003:203,
    author = {Masanobu Katagi and Izuru Kitamura and Toru Akishita and Tsuyoshi Takagi},
    title = {Novel Efficient Implementations of Hyperelliptic Curve Cryptosystems using Degenerate Divisors},
    howpublished = {Cryptology ePrint Archive, Report 2003/203},
    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.