Researchers Develop First Post-Quantum Security for Bitcoin Lightning Network

A team of university researchers has built what they describe as the first full post-quantum security design for Bitcoin‘s Lightning Network.

Announced on Tuesday, the solution from researchers at East Texas A&M University and other institutions layers new quantum-resistant cryptography on top of the Lightning Network’s existing systems. The hybrid implementation uses ML-DSA digital signatures and ML-KEM key exchange, algorithms standardized by the U.S. National Institute of Standards and Technology.

According to the team, led by Dr. Ahmet Kurt, this design means an attacker would need to break both the new post-quantum cryptography and the classical cryptography to compromise a connection or forge a payment. The working implementation, coded in Rust-Lightning, took roughly three to four months and about 11,000 lines of code.

The researchers noted that while the focus on quantum threats often centers on Bitcoin‘s base layer, the Lightning Network’s own communication and payment systems also face potential risk from future quantum computers. Their work demonstrates that off-chain systems can begin preparing for the quantum era independently.