@misc{cryptoeprint:2004:081,
    author = {Philip Hawkes and Gregory G. Rose},
    title = {Rewriting Variables: the Complexity of Fast Algebraic Attacks on Stream Ciphers},
    howpublished = {Cryptology ePrint Archive, Report 2004/081},
    year = {2004},
    url = {http://eprint.iacr.org/2004/081},
}