Theory of Cryptography

TCC 2005, the 2nd Annual Theory of Cryptography Conference, was held in Cambridge,Massachusetts,onFebruary10–12,2005.Theconferencereceived84 submissions,ofwhichtheprogramcommitteeselected32forpresentation.These proceedings contain the revised versions of the submissions that were presented at the conference. These revisions have not been checked for correctness, and the authors bear full responsib...