Non-malleable non-interactive zero knowledge and adaptive chosen-ciphertext security

A. Sahai
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引用次数: 573

Abstract

We introduce the notion of non-malleable non-interactive zero-knowledge (NIZK) proof systems. We show how to transform any ordinary NIZK proof system into one that has strong non-malleability properties. We then show that the elegant encryption scheme of Naor and Yung (1990) can be made secure against the strongest form of chosen-ciphertext attack by using a non-malleable NIZK proof instead of a standard NIZK proof. Our encryption scheme is simple to describe and works in the standard cryptographic model under, general assumptions. The encryption scheme can be realized assuming the existence of trapdoor permutations.
非延展性非交互零知识和自适应选择密文安全
我们引入了不可延展性非交互零知识证明系统的概念。我们展示了如何将任何普通的NIZK证明系统转化为具有强非延展性的证明系统。然后,我们证明了Naor和Yung(1990)的优雅加密方案可以通过使用不可延展性的NIZK证明而不是标准的NIZK证明来防止最强形式的选择密文攻击。我们的加密方案易于描述,并在一般假设下的标准加密模型中工作。该加密方案可以在存在活板门排列的前提下实现。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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