Year: 2024
Type: conference-paper
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.
Authors: Prerna Arote, Joy Kuri
Institution: Indian Institute of Science Bangalore
Language: English
Subfield: Information Systems
Field: Computer Science
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W4402594322