Cryptology ePrint Archive: BibTeX Citation of Report 2004/322

@misc{cryptoeprint:2004:322,
    author = {Ai-fen Sui and Sherman S.M. Chow and Lucas C.K. Hui and S.M. Yiu and K.P. Chow and W.W. Tsang and C.F. Chong and K.H. Pun and H.W. Chan},
    title = {Separable and Anonymous Identity-Based Key Issuing},
    howpublished = {Cryptology ePrint Archive, Report 2004/322},
    year = {2004},
    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.