Daniele Micciancio Shien Jin Ong Amit Sahai Salil P. Vadhan Concurrent Zero Knowledge without Complexity Assumptions Electronic Colloquium on Computational Complexity (ECCC) 2005 093 db/journals/eccc/eccc12.html#TR05-093 http://eccc.hpi-web.de/eccc-reports/2005/TR05-093/index.html