@misc{cryptoeprint:2007:161,
    author = {Ling Cheung and Joseph A. Cooley and Roger Khazan and Calvin Newport},
    title = {Collusion-Resistant Group Key Management Using Attribute-Based Encryption},
    howpublished = {Cryptology ePrint Archive, Report 2007/161},
    year = {2007},
    url = {http://eprint.iacr.org/2007/161},
}