@misc{cryptoeprint:2008:166,
    author = {Nicolas T. Courtois and Karsten Nohl and Sean O'Neil},
    title = {Algebraic Attacks on the Crypto-1 Stream Cipher in MiFare Classic and Oyster Cards},
    howpublished = {Cryptology ePrint Archive, Report 2008/166},
    year = {2008},
    url = {http://eprint.iacr.org/2008/166},
}