Cryptology ePrint Archive: BibTeX Citation of Report 2004/211

@misc{cryptoeprint:2004:211,
    author = {Ian F. Blake and Aldar C-F. Chan},
    title = {Scalable, Server-Passive, User-Anonymous Timed Release Public Key Encryption from Bilinear Pairing},
    howpublished = {Cryptology ePrint Archive, Report 2004/211},
    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.