A research team from East Texas A&M University, North American University, Florida Gulf Coast University, and Florida Institute of Technology has developed a post-quantum security design for the Bitcoin Lightning Network. The project, led by Dr. Ahmet Kurt, was announced on Tuesday and aims to protect off-chain payment channels from potential threats posed by future quantum computers.
The implementation, which took approximately three to four months to complete, consists of roughly 11,000 lines of code. The researchers integrated their solution into Rust-Lightning, focusing on securing communications and payment requests. The design functions as a hybrid system, layering quantum-resistant cryptography over the existing methods currently used by the network.
The team utilized ML-DSA digital signatures and ML-KEM key exchange, both of which are algorithms standardized by the U.S. National Institute of Standards and Technology. By combining these with classical cryptographic methods, the design requires an attacker to compromise both the new and old layers to successfully forge a payment request or breach a connection.
The researchers emphasized that the Lightning Network requires independent preparation for the quantum era, regardless of upgrades to the Bitcoin mainnet. While some developers argue that current quantum computing capabilities remain limited, the team noted that their work provides a functional implementation that allows off-chain systems to begin integrating quantum-resistant defenses immediately.
