Cryptology ePrint Archive: BibTeX Citation of Report 2004/236

@misc{cryptoeprint:2004:236,
    author = {FU Xiaotong, XU Chunxiang and XIAO Guozhen},
    title = {Forgery Attacks on Chang et al.'s signature scheme with message recovery},
    howpublished = {Cryptology ePrint Archive, Report 2004/236},
    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.