@misc{cryptoeprint:2004:243,
    author = {Giuseppe Ateniese and Breno de Medeiros},
    title = {On the Key Exposure Problem in Chameleon Hashes},
    howpublished = {Cryptology ePrint Archive, Report 2004/243},
    year = {2004},
    url = {http://eprint.iacr.org/2004/243},
}