Ripple Releases XRPL Post-Quantum Migration Roadmap, Targeting Full Transition by 2028 at the Latest

Ripple has unveiled a four-phase roadmap for post-quantum security on the XRP Ledger (XRPL), aiming to complete the full transition to a post-quantum signature system by 2028 at the latest. The roadmap includes: a Q-Day emergency migration mechanism; quantum risk assessment and testing of NIST-recommended algorithms in the first half of 2026; parallel integration of candidate post-quantum signature schemes on Devnet in the second half of 2026; and subsequent network-wide, large-scale cutover via an XRPL Amendment. Ripple stated it is already collaborating with Project Eleven on validator testing, Devnet benchmarking, and development of a custodial wallet prototype. It emphasized that assets are not under immediate threat today but must address the “harvest now, decrypt later” risk.