@misc{cryptoeprint:2004:205,
    author = {Ernie Brickell and Jan Camenisch and Liqun Chen},
    title = {Direct Anonymous Attestation },
    howpublished = {Cryptology ePrint Archive, Report 2004/205},
    year = {2004},
    url = {http://eprint.iacr.org/2004/205},
}