@misc{cryptoeprint:2008:279,
    author = {Elaine Shi and Brent Waters},
    title = {Delegating Capabilities in Predicate Encryption Systems},
    howpublished = {Cryptology ePrint Archive, Report 2008/279},
    year = {2008},
    url = {http://eprint.iacr.org/2008/279},
}