@misc{cryptoeprint:2008:226,
    author = {Chunbo Ma and Jun Ao},
    title = {Proxy Key Re-encapsulation Mechanism for Group Communications},
    howpublished = {Cryptology ePrint Archive, Report 2008/226},
    year = {2008},
    url = {http://eprint.iacr.org/2008/226},
}