@misc{cryptoeprint:2012:155,
    author = {Laila El Aimani and Marc Joye
},
    title = {Toward Practical Group Encryption
},
    howpublished = {Cryptology ePrint Archive, Report 2012/155},
    year = {2012},
    url = {http://eprint.iacr.org/2012/155},
}