@misc{cryptoeprint:2003:167,
    author = {Giuseppe Ateniese and Breno de Medeiros },
    title = {Identity-based Chameleon Hash and Applications},
    howpublished = {Cryptology ePrint Archive, Report 2003/167},
    year = {2003},
    url = {http://eprint.iacr.org/2003/167},
}