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arXiv 2102.04685cs.CR
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通过区块链进行公平的点对点内容交付

Fair Peer-to-Peer Content Delivery via Blockchain

Songlin He, Yuan Lu, Qiang Tang, Guiling Wang, Chase Qishi Wu

摘要:

与传统的内容分发网络(CDN)相比,点对点(P2P)内容分发有望提供成本节约和可扩展的峰值需求处理等优势,并补充Filecoin等分散式存储网络。然而,可靠的P2P递送需要递送公平性的适当实施,即,对及时送达的,给予相应的奖励。不幸的是,大多数现有的研究交付公平性是基于非合作博弈论的假设,可以说是不切实际的ad-hoc p2p设置。我们首次提出了P2P内容交付的表达性但仍然是最低限度的安全性,并通过区块链分别为P2P下载和P2P流媒体场景提供了两种有效的解决方案FairDownload和FairStream。我们的设计不仅保证了交付公平性,确保交付者的报酬(几乎)与他的及时交付成正比,而且还确保了内容消费者和内容提供方得到公平对待。当其他两方串通任意胡作非为时,每一方的公平性都能得到保证。此外,该系统是有效的,在这个意义上实现渐近最优的链上成本和最佳的交付商通信。我们实现了在以太坊Ropsten网络上构建原型系统的协议。在局域网和广域网环境下进行的大量实验表明,它们具有很高的实用性。

英文摘要:

Peer-to-peer (p2p) content delivery is promising to provide benefits like cost-saving and scalable peak-demand handling in comparison with conventional content delivery networks (CDNs) and complement the decentralized storage networks such as Filecoin. However, reliable p2p delivery requires proper enforcement of delivery fairness, i.e., the deliverers should be rewarded according to their in-time delivery. Unfortunately, most existing studies on delivery fairness are based on non-cooperative game-theoretic assumptions that are arguably unrealistic in the ad-hoc p2p setting. We for the first time put forth the expressive yet still minimalist securities for p2p content delivery, and give two efficient solutions FairDownload and FairStream via the blockchain for p2p downloading and p2p streaming scenarios, respectively. Our designs not only guarantee delivery fairness to ensure deliverers be paid (nearly) proportional to his in-time delivery, but also ensure the content consumers and content providers to be fairly treated. The fairness of each party can be guaranteed when the other two parties collude to arbitrarily misbehave. Moreover, the systems are efficient in the sense of attaining asymptotically optimal on-chain costs and optimal deliverer communication. We implement the protocols to build the prototype systems atop the Ethereum Ropsten network. Extensive experiments done in LAN and WAN settings showcase their high practicality.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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