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Rewarding relays for decentralised NAT traversal using smart contracts

Keizer, NV; Ascigil, O; Psaras, I; Pavlou, G; (2020) Rewarding relays for decentralised NAT traversal using smart contracts. In: Melodia, T and Ekici, E and Abouzeid, A and Chen, M, (eds.) Mobihoc '20: Proceedings of the Twenty-First International Symposium on Theory, Algorithmic Foundations, and Protocol Design for Mobile Networks and Mobile Computing. (pp. pp. 309-314). ACM Green open access

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Abstract

Traversing NAT's remains a big issue in P2P networks, and many of the previously proposed solutions are incompatible with truly decentralised emerging applications. Such applications need a decentralised NAT traversal solution without trusted centralised servers. In this paper we present a decentralised, relay-based NAT traversal system, where any reachable node is able to assist an unreachable node in NAT traversal. Smart contracts on the Ethereum blockchain are used to ensure fair rewards. Besides financial incentives, a reputation system based on transactions on-chain is used to mitigate against malicious behaviour, and guide peer discovery. Evaluation of our system shows that a combination of historic performance metrics leads to an optimal scoring function, that the system takes little time to reach stability from inception, and that the system is resilient against various attacks. Implementation of the smart contract shows that the cost for participants is manageable.

Type: Proceedings paper
Title: Rewarding relays for decentralised NAT traversal using smart contracts
Event: Mobihoc '20
Open access status: An open access version is available from UCL Discovery
DOI: 10.1145/3397166
Publisher version: https://doi.org/10.1145/3397166.3412799
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng
URI: https://discovery.ucl.ac.uk/id/eprint/10113076
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