@misc{cryptoeprint:2004:038,
    author = {Xiaofeng Chen and Fangguo Zhang and Kwangjo Kim },
    title = {Chameleon Hashing without Key Exposure},
    howpublished = {Cryptology ePrint Archive, Report 2004/038},
    year = {2004},
    url = {http://eprint.iacr.org/2004/038},
}