Cryptology ePrint Archive: BibTeX Citation of Report 2003/229

@misc{cryptoeprint:2003:229,
    author = {Dong Hoon Lee and Jaeheon Kim and Jin Hong and Jae Woo Han and Dukjae Moon},
    title = {Algebraic Attacks on Summation Generators},
    howpublished = {Cryptology ePrint Archive, Report 2003/229},
    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.