Ripple Outlines Four-Phase Plan for XRP Ledger Quantum Security

Ripple has outlined a four-phase strategy to secure the XRP Ledger against future quantum computing threats, setting a target of full quantum readiness by 2028. The plan, announced on April 20, 2026, aims to preemptively protect the network before quantum computers become capable of breaking current cryptographic standards.

The initiative responds to research published in March 2026 by Google's Quantum AI team, which found that approximately 500,000 physical qubits could be sufficient to break elliptic curve cryptography, the system securing private keys across most blockchains. At that scale, a quantum computer could theoretically derive a private key from an exposed public key in about nine minutes. Researchers refer to the point when such attacks become practical as "QDay."

"The goal is not to wait until quantum computing becomes an immediate threat," said Ayo Akinyele, Ripple's senior director of engineering. "It is to make sure critical financial infrastructure can evolve well before that point without disrupting the systems, assets and users that depend on it."

Ripple's roadmap begins with an emergency contingency phase. If credible quantum threats emerge before the full...