@misc{cryptoeprint:2011:522,
    author = {Imran Abbasi, Mehreen Afzal},
    title = {A Compact S-Box Design for SMS4 Block Cipher},
    howpublished = {Cryptology ePrint Archive, Report 2011/522},
    year = {2011},
    url = {http://eprint.iacr.org/2011/522},
}