@misc{cryptoeprint:2012:572,
    author = {Divya Gupta and Amit Sahai},
    title = {On Constant-Round Concurrent Zero-Knowledge from a Knowledge Assumption},
    howpublished = {Cryptology ePrint Archive, Report 2012/572},
    year = {2012},
    url = {http://eprint.iacr.org/2012/572},
}