TechFlow News, April 21: 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 scheme no later than 2028. The roadmap includes: (1) a Q-Day emergency migration mechanism; (2) quantum risk assessment and testing of NIST-recommended algorithms in the first half of 2026; (3) parallel integration of candidate post-quantum signature schemes on Devnet in the second half of 2026; and (4) 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 current assets are not at immediate risk, but proactive measures are necessary to address the “harvest now, decrypt later” threat.
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