Google · NIST · Bitcoin · Crypto Briefing
Ripple gears up XRP Ledger for quantum computing risks ahead of Q-Day
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A four-phase roadmap targets full quantum readiness by 2028, with emergency migration plans already in place if threats arrive sooner.
Key facts
- Phase 2 is already underway during the first half of 2026
- The urgency stems from a March 2026 finding by Google’s Quantum AI team: 500,000 physical qubits could be enough to break elliptic curve cryptography, the math that keeps private keys private
- Ripple is testing NIST-standard post-quantum algorithms, specifically ML-DSA and Dilithium, in collaboration with Project Eleven
- The later phases aim to introduce a formal XRPL amendment for native post-quantum support and achieve full quantum readiness by 2028
Summary
Ripple has laid out a detailed four-phase plan to make the XRP Ledger quantum-proof by 2028, responding to research suggesting that the cryptographic foundations underpinning most blockchains could be cracked faster than previously assumed. The urgency stems from a March 2026 finding by Google’s Quantum AI team: 500,000 physical qubits could be enough to break elliptic curve cryptography, the math that keeps private keys private across virtually every blockchain in existence. Ripple’s roadmap starts with what it calls “Phase 1: Q-Day readiness,” an emergency contingency plan. Phase 2 is already underway during the first half of 2026.