Cryptology ePrint Archive: BibTeX Citation of Report 2007/354

@misc{cryptoeprint:2007:354,
    author = {Cheng-Kang Chu and Wen-Guey Tzeng},
    title = {Identity-Committable Signatures and Their Extension to Group-Oriented Ring Signatures},
    howpublished = {Cryptology ePrint Archive, Report 2007/354},
    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.