@misc{cryptoeprint:2009:489,
    author = {Jiali Choy and Huihui Yap},
    title = {Impossible Boomerang Attack for Block Cipher Structures},
    howpublished = {Cryptology ePrint Archive, Report 2009/489},
    year = {2009},
    url = {http://eprint.iacr.org/2009/489},
}