Ripple Unveils Four Phase Plan to Secure XRP Ledger Against Quantum Threat

Ripple has taken a proactive approach to addressing the potential threat of quantum attacks on the XRP Ledger by announcing a four-phase plan to make the network quantum-resistant. The announcement comes after Google Quantum AI research suggested that approximately 500,000 physical qubits could eventually break the elliptic curve cryptography that secures most blockchains today.

The four-phase plan includes Phase 1, Q-Day readiness, which is an emergency contingency that would involve a 'hard shift' to quantum-safe accounts if classical cryptography is compromised. Phase 2 is already underway, with Ripple's applied cryptography team testing NIST-standardized post-quantum algorithms against real XRPL workloads in partnership with Project Eleven.

The third phase will deploy candidate post-quantum signature schemes alongside existing signatures on Devnet for developer testing without affecting mainnet. The final phase proposes a formal network amendment implementing native post-quantum cryptography at scale by 2028, focusing on throughput optimization and coordinated migration across all XRPL participants.