@misc{cryptoeprint:2007:218,
    author = {Eli Biham and Orr Dunkelman},
    title = {Differential Cryptanalysis in Stream Ciphers},
    howpublished = {Cryptology ePrint Archive, Report 2007/218},
    year = {2007},
    url = {http://eprint.iacr.org/2007/218},
}