Detect and Isolate an Adversary in Fakey and Griefing-R Attack on Lightning Network

Arote, P and Kuri, J (2024) Detect and Isolate an Adversary in Fakey and Griefing-R Attack on Lightning Network. In: 7th IEEE International Conference on Blockchain, Blockchain 2024, 19 August 2024through 22 August 2024, Copenhagen, pp. 563-568.

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Abstract

Off-chain payment solutions, called layer-2 solutions, address scalability issues in the blockchain. They help to process transactions faster and reduce the computational cost of the blockchain. In the Lightning Network, the popular off-chain solution, multi-hop payment is performed using HTLCs. Two prominent attacks against HTLCs are the Fakey attack, where an adversary manipulates the payment key, and the Griefing-R attack, where an adversary refuses to provide the preimage of a payment hash to its predecessor node. Both these attacks exhaust channel capacities of routing nodes and lead to reduced throughput. We propose a scheme using cryptographic commitments and signatures that detects an adversary performing any of these attacks and punishes the adversary by isolating it from the network. We implement the proposed scheme using the LND implementation of the Lightning Network. Further, we analyze the correctness of the scheme. © 2024 IEEE.

Item Type:	Conference Paper
Publication:	Proceedings - 2024 IEEE International Conference on Blockchain, Blockchain 2024
Publisher:	Institute of Electrical and Electronics Engineers Inc.
Additional Information:	The copyright for this article belongs to publisher.
Keywords:	Blockchain; Cryptography, Block-chain; Channel network; Commitment; Computational costs; Fakey and griefing-R attack; Hash time-locked contract; Layer 2; Multi-hops; Payment channel network; Scalability issue
Department/Centre:	Division of Electrical Sciences > Electronic Systems Engineering (Formerly Centre for Electronic Design & Technology)
Date Deposited:	23 Oct 2024 17:12
Last Modified:	23 Oct 2024 17:12
URI:	http://eprints.iisc.ac.in/id/eprint/86645

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