Ripple announced a four-phase strategic roadmap on April 20, 2026, to make the XRP Ledger quantum-resistant by 2028. The initiative addresses research from Google's Quantum AI team showing that 500,000 physical qubits could compromise elliptic curve cryptography in nine minutes. Ripple is currently testing NIST-standard algorithms like ML-DSA and Dilithium with Project Eleven. While only 0.03% of XRP's supply is vulnerable in dormant accounts, other networks like Bitcoin and Ethereum are also developing quantum defenses.
Ripple four-phase quantum-resistance plan
- ▪Phase 1 of Ripple's roadmap establishes an emergency contingency plan to rapidly migrate accounts to quantum-safe alternatives if quantum threats materialize before the full upgrade is complete.
- ▪The XRP Ledger currently supports account key rotation without modifying the underlying account structure, which Ripple states will facilitate smoother future security transitions.
- ▪The final phases of Ripple's roadmap aim to introduce a formal XRP Ledger amendment for native post-quantum support and achieve full quantum readiness by 2028.
- ▪Ripple announced a four-phase strategic roadmap on April 20, 2026, to make the XRP Ledger quantum-resistant by 2028.
Quantum computing blockchain threat
- ▪Recent Anthropic AI models demonstrated the capability to reduce the computational requirements for compromising a prominent post-quantum signature algorithm by approximately 67 million times.
- ▪A March 2026 finding by Google's Quantum AI team showed that 500,000 physical qubits could break elliptic curve cryptography and derive a private key in approximately nine minutes.
- ▪Quantum computers could potentially reverse-engineer private keys from publicly accessible blockchain information, a vulnerability threshold that security experts designate as 'Q-Day.'
XRP Ledger vulnerability assessment
- ▪Active XRP Ledger accounts that have not broadcast transactions maintain protected public keys because their public keys are not revealed on-chain.
- ▪Bitcoin's quantum exposure is larger than XRP's because older pay-to-public-key addresses, including those believed to belong to Satoshi Nakamoto, have fully visible public keys on-chain.
- ▪An independent audit found that only 0.03% of the total XRP supply sits in dormant accounts with exposed public keys, which are vulnerable to quantum exploitation.
Post-quantum cryptographic algorithm testing
- ▪Ripple plans to deploy testnets for its quantum-resistant upgrades throughout mid-2026 to ensure performance and develop custody prototypes.
- ▪During the first half of 2026, Ripple is testing NIST-standard post-quantum algorithms, specifically ML-DSA and Dilithium, in collaboration with Project Eleven.
- ▪Dilithium signatures are roughly 40 times larger than current ECDSA signatures, which could impact transaction throughput, storage requirements, and network bandwidth on the XRP Ledger.
Blockchain quantum-defense initiatives
- ▪Ayo Akinyele, Ripple's senior director of engineering, stated that the goal is to secure critical financial infrastructure well before quantum computing becomes an immediate threat.
- ▪Development teams for Bitcoin and Ethereum are actively pursuing digital signature replacements to defend their respective networks against practical quantum computing threats.
Story comments
Loading comments…