@misc{cryptoeprint:2009:475,
    author = {Koray Karabina},
    title = {Double-Exponentiation in Factor-4 Groups and its Applications},
    howpublished = {Cryptology ePrint Archive, Report 2009/475},
    year = {2009},
    url = {http://eprint.iacr.org/2009/475},
}