Cryptology ePrint Archive: BibTeX Citation of Report 2007/004

@misc{cryptoeprint:2007:004,
    author = {*Jue-Sam Chou, Yalin Chen, Chung-Ju Chan},
    title = {Cryptanalysis of Hwang-Chang’s a Time-Stamp Protocol for Digital Watermarking},
    howpublished = {Cryptology ePrint Archive, Report 2007/004},
    year = {2007},
    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.