Blockchain-Based P2P Content Delivery With Monetary Incentivization and Fairness Guarantee

Document Type

Article

Publication Date

2-1-2023

Abstract

Peer-to-peer (P2P) content delivery is up-and-coming to provide benefits comprising cost-saving and scalable peak-demand handling compared with centralized content delivery networks (CDNs), and also complementary to the popular decentralized storage networks such as Filecoin. However, reliable P2P delivery demands proper enforcement of delivery fairness, i.e., the deliverers should be rewarded in line with their in-time delivery. Unfortunately, most existing studies on delivery fairness are on the basis of non-cooperative game-theoretic assumptions that are arguably unrealistic in the ad-hoc P2P setting. We propose an expressive yet still minimalist security requirement for desired fair P2P content delivery, and give two efficient blockchain-enabled and monetary-incentivized solutions ${\mathsf {FairDownload}}$FairDownload and ${\mathsf {FairStream}}$FairStream for P2P downloading and P2P streaming scenarios, respectively. Our designs not only ensure delivery fairness where deliverers are paid (nearly) proportional to their in-time delivery, but also guarantee exchange fairness where content consumers and content providers are also fairly treated. The fairness of each party can be assured even when other two parties collude to arbitrarily misbehave. Our protocols provide a general design of fetching content chunk from any specific position so the delivery can be resumed in the presence of unexpected interruption. Further, our systems are efficient in the sense of achieving asymptotically optimal on-chain costs and optimal delivery communication. We implement the prototype and deploy on the Ethereum Ropsten network. Extensive experiments in both LAN and WAN settings are conducted to evaluate the on-chain costs as well as the efficiency of downloading and streaming. Experimental results show the practicality and efficiency of our protocols.

Identifier

85141544581 (Scopus)

Publication Title

IEEE Transactions on Parallel and Distributed Systems

External Full Text Location

https://doi.org/10.1109/TPDS.2022.3217036

e-ISSN

15582183

ISSN

10459219

First Page

746

Last Page

765

Issue

2

Volume

34

Grant

693JJ320C000021

Fund Ref

Sichuan Province Science and Technology Support Program

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