Ripple is advancing a structured four-stage program to equip the XRP Ledger with quantum-resistant cryptography, aiming for full readiness by 2028. The effort treats the challenge as long-term infrastructure work rather than a last-minute fix, seeking to protect wallets, transactions and related systems before quantum machines can reliably compromise current elliptic-curve protections.

Ayo Akinyele, Ripple’s senior director of engineering, framed the approach clearly. The objective is to ensure critical financial infrastructure can evolve well before quantum computing becomes an immediate threat, without disrupting the systems, assets and users that depend on it.

Why Quantum Computing Poses a Risk

A sufficiently powerful quantum computer could reverse-engineer private keys from publicly visible information, undermining the cryptography that secures most blockchains and traditional banking systems. Researchers refer to the arrival of practical machines capable of this as Q-Day.

In March 2026, Google’s Quantum AI team estimated that roughly 500,000 physical qubits could break elliptic-curve cryptography. At that scale, deriving a private key from an exposed public key might take about nine minutes. Earlier projections had assumed far higher qubit counts, so the revised figure has shortened the timeline many in the industry previously expected.

Artificial intelligence adds further pressure. AI systems can accelerate the search for cryptographic weaknesses, creating a parallel risk that any quantum-resistant design must also withstand faster, lower-cost classical attacks. At the same time, AI agents are beginning to execute autonomous payments, raising demand for always-available, internet-native rails that remain secure under new conditions.

The Four-Stage Roadmap

Ripple’s plan begins with a network-wide assessment of which components would be exposed if existing cryptography failed. The second stage tests alternative cryptographic methods against the actual workloads the ledger handles today. Testing of NIST-standardized post-quantum algorithms, including ML-DSA and Dilithium, is already under way in partnership with Project Eleven, a firm focused on quantum security research and benchmarking. The goal is to confirm that quantum resistance can be added without slowing the network or degrading user experience.

Later stages call for operating current security mechanisms alongside quantum-resistant alternatives in parallel. This dual-track approach is intended to ease the eventual switch rather than force an abrupt change. The final stage targets a formal network amendment that would introduce native post-quantum support, followed by a coordinated transition across the broader ecosystem by 2028.

An emergency contingency is built into the earliest phase. If credible quantum threats emerge before the full upgrade is complete, the network could trigger rapid migration of accounts to quantum-safe alternatives. Testnet activity was expected through mid-2026 as part of the overall schedule.

Migration Advantages and Limited Exposure

The XRP Ledger already permits users to replace the keys that control an account without changing the account address itself. Ripple views this feature as a practical advantage that could simplify any future shift to quantum-resistant cryptography and reduce the need for entirely new wallets or addresses.

Any rule change still requires coordination among the network’s independent validators. Technical readiness alone is therefore insufficient; governance consensus will be essential for a smooth rollout.

Current exposure appears limited. An independent audit found that only about 0.03 percent of XRP’s total supply sits in dormant accounts with exposed public keys. Active accounts that have not yet broadcast a transaction do not reveal their public keys on-chain. This contrasts with older Bitcoin address types where public keys are fully visible, including certain long-dormant holdings. The lower figure reduces the surface available for “harvest now, decrypt later” attacks in which adversaries collect data today and wait for quantum capability.

Broader Industry Context

Bitcoin and Ethereum developers are separately examining replacements for the digital-signature schemes their networks currently use. The shared challenge across chains is not merely identifying suitable new algorithms but deploying them at the scale of a financial network, within existing hardware and software constraints, and with enough lead time for users to migrate safely.

Ripple’s philosophy centers on starting early so that options remain open when the threat materializes. The stated aim is a deliberate, orderly transition rather than a reactive scramble under crisis conditions. As AI-driven automation and quantum advances continue in parallel, the firm argues that payment infrastructure must be prepared to support autonomous economic activity while remaining cryptographically sound.

The work is already under way, with algorithm testing in progress and a clear target of production-ready post-quantum support on the XRP Ledger no later than 2028.