@misc{cryptoeprint:2011:301,
    author = {Ronald Cramer and Ivan Damgard and Valerio Pastro},
    title = {On the Amortized Complexity of Zero Knowledge Protocols for Multiplicative Relations},
    howpublished = {Cryptology ePrint Archive, Report 2011/301},
    year = {2011},
    url = {http://eprint.iacr.org/2011/301},
}