@misc{cryptoeprint:2012:306,
    author = {Marcel Keller and Gert Læssøe Mikkelsen and Andy Rupp},
    title = {Efficient Threshold Zero-Knowledge with Applications to User-Centric Protocols},
    howpublished = {Cryptology ePrint Archive, Report 2012/306},
    year = {2012},
    url = {http://eprint.iacr.org/2012/306},
}