Cryptology ePrint Archive: BibTeX Citation of Report 2007/019

@misc{cryptoeprint:2007:019,
    author = {Changshe Ma, Jian Weng and Dong Zheng},
    title = {Fast Digital Signature Schemes as Secure as Diffie-Hellman Assumptions},
    howpublished = {Cryptology ePrint Archive, Report 2007/019},
    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.