Cryptology ePrint Archive: BibTeX Citation of Report 2009/421

@misc{cryptoeprint:2009:421,
    author = {Tsz Hon Yuen and Willy Susilo and Yi Mu},
    title = {How to Construct Identity-Based Signatures without the Key Escrow Problem},
    howpublished = {Cryptology ePrint Archive, Report 2009/421},
    year = {2009},
    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.