Coinbase Outlines Post-Quantum Technical Transition Pathways for Bitcoin Network

Coinbase has published technical proposals to transition Bitcoin to post-quantum cryptography, separating address architecture from signing algorithms while leaving legacy address policies unresolved. Key signature candidates evaluated include ML-DSA, SLH-DSA, FN-DSA, and the experimental SHRINCS design, alongside address updates like BIP-360 (P2MR), P2TRv2, and hybrid formats. The proposals follow warnings from Coinbase cryptography leadership that quantum advances could sever the link between private signing keys and asset ownership. Potential legacy handling measures remain open for community debate, including signature sunsets, rate limits, and recovery systems.