East Texas A&M researchers develop quantum-resistant security for Bitcoin Lightning Network

Researchers at East Texas A&M University have developed the Post-Quantum Lightning Network (PQLN), a system designed to protect Bitcoin’s Lightning Network from future quantum computing threats. The implementation uses a hybrid security structure that integrates NIST-standardized lattice-based algorithms, specifically ML-DSA and ML-KEM, to defend against potential attacks.

PQLN focuses on securing off-chain communication layers, including node-to-node communication, network information propagation, payment invoices, and onion routing. By applying these quantum-resistant measures to a fork of ‘rust-lightning’, the researchers demonstrated that PQLN nodes can operate alongside existing legacy nodes without interrupting payments. Testing showed a minimal computational overhead of approximately 0.33 milliseconds per operation.

While the system enhances security, it introduces increased data requirements. Using ML-DSA can increase gossip data volume by roughly ten times, though using the Falcon signature scheme can reduce this increase to approximately four times. The research aims to mitigate ‘harvest now, decrypt later’ attacks, where adversaries collect encrypted data today to decrypt it once powerful quantum computers become available. This development serves as a proactive test for transitioning cryptocurrency infrastructure to quantum-resistant protocols.