@misc{cryptoeprint:2006:441,
    author = {Donghoon Chang, Mridul Nandi},
    title = {General Distinguishing Attacks on NMAC and HMAC with Birthday Attack Complexity},
    howpublished = {Cryptology ePrint Archive, Report 2006/441},
    year = {2006},
    url = {http://eprint.iacr.org/2006/441},
}