@misc{cryptoeprint:2005:115,
    author = {Marco Macchetti},
    title = {Characteristics of Key-Dependent S-Boxes: the Case of Twofish},
    howpublished = {Cryptology ePrint Archive, Report 2005/115},
    year = {2005},
    url = {http://eprint.iacr.org/2005/115},
}