论文标题
Garou：高效且安全的障碍链多党付款中心
Garou: An Efficient and Secure Off-Blockchain Multi-Party Payment Hub
论文作者
论文摘要
为了减轻分散的加密货币（例如比特币和以太坊）的可伸缩性问题，已提出了允许两方执行安全的硬币转移而无需涉及区块链的付款渠道。支付渠道将两方的交易吞吐量增加到仅受其网络带宽限制的级别。最近的建议着重于将两党支付渠道扩展到N-Party支付中心。不幸的是，在没有值得信赖的第三方的情况下，它们都无法达到效率，灵活性。在本文中，我们提出了Garou，这是一个安全的N-Party付款中心，允许多方执行安全的链链硬币转移。除纠纷外，付款中心内的参与者可以在不参与区块链或任何第三方中介机构的情况下彼此进行并发和直接的硬币转移。这使Garou能够达到高性能和灵活性。加鲁还保证，诚实的政党始终保持其平衡安全性，以抵抗强大的对抗能力。为了证明GAROU协议的可行性，我们为以太坊网络开发了概念原型的证明。我们的评估结果表明，GAROU的最大交易吞吐量比最先进的付款中心高20倍。
To mitigate the scalability problem of decentralized cryptocurrencies such as Bitcoin and Ethereum, the payment channel, which allows two parties to perform secure coin transfers without involving the blockchain, has been proposed. The payment channel increases the transaction throughput of two parties to a level that is only limited by their network bandwidth. Recent proposals focus on extending the two-party payment channel to the N-party payment hub. Unfortunately, none of them can achieve efficiency, flexibility in the absence of a trusted third-party. In this paper, we propose Garou, a secure N-party payment hub that allows multiple parties to perform secure off-chain coin transfers. Except in the case of disputes, participants within the payment hub can make concurrent and direct coin transfers with each other without the involvement of the blockchain or any third-party intermediaries. This allows Garou to achieve both high-performance and flexibility. Garou also guarantees that an honest party always maintains its balance security against strong adversarial capabilities. To demonstrate the feasibility of the Garou protocol, we develop a proof of concept prototype for the Ethereum network. Our evaluation results show that the maximum transaction throughput of Garou is 20 times higher than that of state-of-art payment hubs.
