@misc{cryptoeprint:2009:109,
    author = {Haina Zhang and Xiaoyun Wang},
    title = {Cryptanalysis  of  Stream Cipher Grain  Family},
    howpublished = {Cryptology ePrint Archive, Report 2009/109},
    year = {2009},
    url = {http://eprint.iacr.org/2009/109},
}