@misc{cryptoeprint:2009:431,
    author = {Yun Tian and Gongliang Chen and Jianhua Li},
    title = {On the Design of Trivium},
    howpublished = {Cryptology ePrint Archive, Report 2009/431},
    year = {2009},
    url = {http://eprint.iacr.org/2009/431},
}