Multiple non-interactive zero knowledge proofs based on a single random string

Abstract
The authors solve the two major open problems associated with noninteractive zero-knowledge proofs: how to enable polynomially many provers to prove in writing polynomially many theorems based on the basis of a single random string, and how to construct such proofs under general (rather than number-theoretic) assumptions. The constructions can be used in cryptographic applications in which the prover is restricted to polynomial time, and they are much simpler than earlier (and less capable) proposals.

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