Ripple Just Revealed a Four-Phase Plan to Quantum-Proof the XRP Ledger by 2028

Quantum computing used to be a problem for “someday.” That someday just got a whole lot closer.

Ripple dropped a major announcement today, publishing a detailed four-phase roadmap to make the XRP Ledger fully quantum-resistant by 2028. The move comes in direct response to recent Google Quantum AI research showing that sufficiently advanced quantum computers could crack current blockchain encryption far sooner than most people expected.

And here is the part that should get your attention: while Bitcoin has roughly 35% of its total supply sitting in wallets with exposed public keys, XRP’s exposure sits at just 0.03%. That is not a typo.

CoinMarketCap summed up the announcement:

The plan is broken into four distinct phases. Phase 1 establishes what Ripple calls a “Q-Day contingency,” essentially an emergency protocol that would force the entire network to reject classical cryptographic signatures if current standards are compromised unexpectedly. Users would migrate their funds to quantum-safe accounts using post-quantum zero-knowledge proofs.

Phase 2 is already underway. During the first half of 2026, Ripple is testing NIST-standardized quantum-resistant algorithms under real XRP Ledger workload conditions. They are partnering with Project Eleven on validator-level testing, Devnet benchmarking, and building a post-quantum custody wallet prototype.

Phase 3, slated for the second half of this year, will introduce hybrid signatures on Devnet, running post-quantum and traditional elliptic curve cryptography side by side. Phase 4 targets a full production rollout through a formal XRPL network amendment by 2028.

One of the biggest advantages Ripple highlighted is something most other blockchains simply do not have: native key rotation. XRPL users can migrate away from potentially vulnerable keys without changing their underlying accounts. That gives XRP holders a practical escape route as quantum threats evolve, rather than having their value permanently locked to a single key pair.

BankXRP, one of the most-followed XRP community accounts, laid it out plainly:

According to Decrypt, Google estimates that a quantum computer with around 500,000 physical qubits could derive a private key from an exposed public key in about nine minutes. Roughly 6.9 million Bitcoin are sitting in wallets with exposed keys right now. The “harvest now, decrypt later” threat, where bad actors collect encrypted data today and wait for quantum hardware to mature, makes this more than a distant hypothetical.

Ripple is designing for what they call “cryptographic agility,” supporting multiple NIST-standardized algorithms rather than betting on a single scheme. That way, XRPL can adapt as the post-quantum landscape matures.

XRP is trading at $1.43 as of this writing, up about 7% on the week. The token has been on a strong run in April, logging its best monthly performance since September 2025.

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