A cryptographically sound Dolev-Yao style security proof of an electronic payment system

M. Backes, Markus Dürmuth
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引用次数: 41

Abstract

We present the first cryptographically sound Dolev-Yao-style security proof of a comprehensive electronic payment system. The payment system is a slightly simplified variant of the 3KP payment system and comprises a variety of different security requirements ranging from basic ones like the impossibility of unauthorized payments to more sophisticated properties like disputability. We show that the payment system is secure against arbitrary active attacks, including arbitrary concurrent protocol runs and arbitrary manipulation of bitstrings within polynomial time if the protocol is implemented using provably secure cryptographic primitives. Although we achieve security under cryptographic definitions, our proof does not have to deal with probabilistic aspects of cryptography and is hence within the scope of current proof tools. The reason is that we exploit a recently proposed Dolev-Yao-style cryptographic library with a provably secure cryptographic implementation. Together with composition and preservation theorems of the underlying model, this allows us to perform the actual proof effort in a deterministic setting corresponding to a slightly extended Dolev-Yao model.
一种加密可靠的Dolev-Yao式电子支付系统的安全证明
我们提出了一个全面的电子支付系统的第一个加密可靠的多尔夫-姚式安全证明。该支付系统是3KP支付系统的一个稍微简化的变体,包含各种不同的安全要求,从基本要求(如不可能未经授权的支付)到更复杂的属性(如可争议性)。我们证明,如果使用可证明的安全加密原语实现协议,则支付系统可以安全抵御任意主动攻击,包括任意并发协议运行和多项式时间内任意位串操作。虽然我们在密码学定义下实现了安全性,但我们的证明不必处理密码学的概率方面,因此在当前证明工具的范围内。原因是我们利用了最近提出的dolev - yao风格的加密库,该库具有可证明的安全加密实现。结合底层模型的组合和保存定理,这使我们能够在与稍微扩展的Dolev-Yao模型相对应的确定性设置中执行实际的证明工作。
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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