Ripple released an official, multi-phase roadmap on April 20, 2026, outlining how the
The threat is not alive today. But as Ripple says: “The threat has gone from theoretical to credible, and preparation times now matter. »
- Ripple Aims for Complete Post-Quantum Crypto Readiness for XRPL in 2028
- Phase 2 experimentation begins with NIST-recommended algorithms H1 2026; Hybrid Devnet Phase 3 deployments follow H2 2026
- XRPL’s native key rotation gives it a structural migration advantage over Ethereum, where no protocol-level equivalent exists
- A “Quantum-Day” contingency plan is already being considered: if classical cryptography unexpectedly fails, XRPL mandates a radical transition to post-quantum accounts using zero-knowledge proofs.
- Ripple collaborates with Project Eleven on validator testing, Devnet benchmarking, and a prototype post-quantum custody wallet
Discover: Best Pre-Launch Token Sales
What Ripple’s Post-Quantum Roadmap Really Includes
The roadmap unfolds in four phases:
Phase 1 – already considered – is a Quantum-Day eventuality: if classical cryptography fails before the transition is complete, XRPL imposes a hard switchover, rejecting classical public-key signatures and requiring funds to migrate to secure post-quantum accounts. The migration path uses PQ-based zero-knowledge proofs to prove ownership of keys without exposing the keys themselves.
Phase 2 (H1 2026) extends experimentation with NIST-finalized algorithms, benchmarking of signature size, verification cost, throughput impact, and storage overhead under real-world XRPL workload conditions. Engineer Denis Angell is already prototyping ML-DSA on AlphaNet. Project Eleven is building a hybrid post-quantum signature implementation alongside validator-level testing and a custody wallet prototype for Devnet.
Phase 3 (H2 2026) moves from isolated testing to running post-quantum signature schemes in parallel with existing elliptic curve signatures on Devnet – live for application developer testing without disrupting the mainnet. This phase also extends to post-quantum primitives for zero-knowledge proofs and homomorphic encryption, relevant to XRPL’s confidential transfers work for tokenization use cases.
Phase 4 (targeting 2028) is the full transition: a new amendment to the XRPL protocol for native post-quantum cryptography, hardened in production for validator performance and deterministic settlement. Ripple describes it as “not just a cryptographic challenge”: the main risk is breaking what already works on a global live settlement network.
The applied cryptography team leading the work – Dr Murat Cenk, Dr Tamas Visegrady, Dr Oleg Burundukov and Dr Aanchal Malhotra – is designing for cryptographic agility: multiple NIST-standardized algorithms rather than a single scheme, so the protocol can adapt as post-quantum standards evolve.
What this means for XRP holders and protocol risk
For XRP holders tracking the protocol’s long-term outlook, the roadmap does two things: it confirms that Ripple takes quantum risk seriously enough to allocate dedicated crypto talent and a multi-year engineering budget, and it draws a clear distinction between
Contingency planning is the most underestimated element. Most quantum blockchain roadmaps assume an orderly, multi-year transition. Ripple Phase 1 plans for the disorderly release – a sudden cryptographic break – using ZK proofs to enable secure fund recovery, even in a compromised environment. This is a significantly different risk position than “we will upgrade eventually”.
A fair caveat: 2028 is still two years away, ledger-scale post-quantum cryptography remains technically unsolved in production, and larger signature sizes could create real performance issues for a network competing on settlement speed.
The Phase 2 benchmarking results – expected in the first half of 2026 – will be the first real data point indicating whether performance trade-offs are manageable. Monitor these Devnet numbers. The evolution of the XRPL protocol is rapidly moving on multiple fronts simultaneously, and quantum readiness is now officially a part of it.
Discover: The best crypto to diversify your portfolio
Google’s Quantum AI Just Pushed Ripple to Develop a 2-Year Defense Plan for XRP: Should Holders Be Worried? appeared first on Cryptonews.
