Cryptology ePrint Archive: BibTeX Citation of Report 2007/069

@misc{cryptoeprint:2007:069,
    author = {Dennis Y. W. Liu and Duncan S. Wong and Xinyi Huang and Guilin Wang and Qiong Huang and Yi Mu and Willy Susilo},
    title = {Nominative Signature: Application, Security Model and Construction},
    howpublished = {Cryptology ePrint Archive, Report 2007/069},
    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.