Cryptology ePrint Archive: BibTeX Citation of Report 2004/046

@misc{cryptoeprint:2004:046,
    author = {Lih-Chung Wang and Fei-Hwang Chang},
    title = {Revision of Tractable Rational Map Cryptosystem},
    howpublished = {Cryptology ePrint Archive, Report 2004/046},
    year = {2004},
    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.