@misc{cryptoeprint:2005:145,
    author = {Ee-Chien Chang and Qiming Li},
    title = {Small Secure Sketch for Point-Set Difference},
    howpublished = {Cryptology ePrint Archive, Report 2005/145},
    year = {2005},
    url = {http://eprint.iacr.org/2005/145},
}