@misc{cryptoeprint:2000:045,
    author = {Ronald Cramer and Ivan Damg{\aa}rd and Philip MacKenzie},
    title = {Efficient Zero-Knowledge Proofs of Knowledge Without Intractability Assumptions},
    howpublished = {Cryptology ePrint Archive, Report 2000/045},
    year = {2000},
    url = {http://eprint.iacr.org/2000/045},
}