@misc{cryptoeprint:2010:144,
    author = {Matthew Green and Susan Hohenberger},
    title = {CPA and CCA-Secure Encryption Systems that are not 2-Circular Secure},
    howpublished = {Cryptology ePrint Archive, Report 2010/144},
    year = {2010},
    url = {http://eprint.iacr.org/2010/144},
}