@misc{cryptoeprint:2011:656,
    author = {ZiJie Xu    and    Ke Xu},
    title = {Use  Data-depend Function Build Message Expansion Function },
    howpublished = {Cryptology ePrint Archive, Report 2011/656},
    year = {2011},
    url = {http://eprint.iacr.org/2011/656},
}