@misc{cryptoeprint:2002:161,
    author = {Jan Camenisch and  Victor Shoup},
    title = {Practical  Verifiable Encryption and Decryption of Discrete Logarithms},
    howpublished = {Cryptology ePrint Archive, Report 2002/161},
    year = {2002},
    url = {http://eprint.iacr.org/2002/161},
}