@misc{cryptoeprint:2012:191,
    author = {Liangliang Xiao and I-Ling Yen},
    title = {Security Analysis and Enhancement for Prefix-Preserving Encryption Schemes},
    howpublished = {Cryptology ePrint Archive, Report 2012/191},
    year = {2012},
    url = {http://eprint.iacr.org/2012/191},
}