Cryptology ePrint Archive: BibTeX Citation of Report 2008/104

@misc{cryptoeprint:2008:104,
    author = {Ernie Brickell, Liqun Chen and Jiangtao Li},
    title = {Simplified Security Notions of Direct Anonymous Attestation and a Concrete Scheme from Pairings},
    howpublished = {Cryptology ePrint Archive, Report 2008/104},
    year = {2008},
    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.