@misc{cryptoeprint:2008:536,
    author = {Emily Shen and Elaine Shi and Brent Waters},
    title = {Predicate Privacy in Encryption Systems },
    howpublished = {Cryptology ePrint Archive, Report 2008/536},
    year = {2008},
    url = {http://eprint.iacr.org/2008/536},
}