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首页> 外文期刊>IEEE transactions on information forensics and security >DCAP: A Secure and Efficient Decentralized Conditional Anonymous Payment System Based on Blockchain
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DCAP: A Secure and Efficient Decentralized Conditional Anonymous Payment System Based on Blockchain

机译：DCAP：基于区块链的安全高效的分散式有条件匿名支付系统

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摘要

Blockchain, a distributed ledger technology, can potentially be deployed in a wide range of applications. Among these applications, decentralized payment systems (e.g. Bitcoin) have been one of the most mature blockchain applications with widespread adoption. While the early designs (e.g. Bitcoin) are often the currency of choice by cybercriminals (e.g., in ransomware incidents), they only provide pseudo-anonymity, in the sense that anyone can deanonymize Bitcoin transactions by using information in the blockchain. To strengthen the privacy protection of decentralized payment systems, a number of solutions such as Monero and Zerocash have been proposed. However, completely Decentralized Anonymous Payment (DAP) systems can be criminally exploited, for example in online extortion and money laundering activities. Recognizing the importance of regulation, we present a novel definition of Decentralized Conditional Anonymous Payment (DCAP) and describe the corresponding security requirements. In order to construct a concrete DCAP system, we first design a Condition Anonymous Payment (CAP) scheme (based on our proposed signature of knowledge), whose security can be demonstrated under the defined formal semantic and security models. To demonstrate utility, we compare the performance of our proposal with that of Zerocash under the same parameters and testing environment.
机译：区块链是一种分布式账本技术，可以潜在地部署在广泛的应用程序中。在这些应用程序中，去中心化支付系统（例如比特币）已被广泛采用，是最成熟的区块链应用程序之一。虽然早期的设计（例如比特币）通常是网络犯罪分子（例如在勒索软件事件中）选择的货币，但它们只能提供伪匿名，因为任何人都可以通过使用区块链中的信息将比特币交易匿名化。为了加强去中心化支付系统的隐私保护，已经提出了许多解决方案，例如Monero和Zerocash。但是，可以完全利用完全分散的匿名支付（DAP）系统，例如在网上勒索和洗钱活动中。认识到监管的重要性，我们提出了分散式有条件匿名支付（DCAP）的新颖定义，并描述了相应的安全要求。为了构建具体的DCAP系统，我们首先设计了条件匿名支付（CAP）方案（基于我们提议的知识签名），其安全性可以在定义的形式语义和安全性模型下得到证明。为了证明实用性，我们在相同的参数和测试环境下，将我们的提案与Zerocash的性能进行了比较。

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