@misc{cryptoeprint:2007:177,
    author = {Dan Boneh and Craig Gentry and Michael Hamburg},
    title = {Space-Efficient Identity Based Encryption Without Pairings},
    howpublished = {Cryptology ePrint Archive, Report 2007/177},
    year = {2007},
    url = {http://eprint.iacr.org/2007/177},
}