Ripple Unveils Quantum Resistance Roadmap, Aiming to Make XRP Ledger Quantum-Secure by 2028

BlockBeats News, April 21st. Ripple officially released the Quantum Resistance Roadmap, with the core goal of achieving quantum resistance for the XRP Ledger (XRPL) by 2028. The roadmap is primarily designed to address the "Harvest Now, Decrypt Later" attack vector, where an attacker collects encrypted data now and waits to decrypt it in the future using quantum computers. The entire plan will progress through four stages:

Stage 1: Q-Day Emergency Preparedness (Initiated). Establish Quantum Day (Q-Day) emergency response mechanisms. In the event of a sudden breach of the existing classical encryption, the network will immediately cease accepting traditional public key signatures, forcing a transition to quantum-secure accounts. Simultaneously explore asset ownership validation schemes based on Post-Quantum ZK-proofs, allowing existing account holders to securely recover funds in emergencies without exposing vulnerable keys.

Stage 2: Risk Assessment and Algorithm Testing (First Half of 2026). Conduct a comprehensive assessment of post-quantum cryptography's impact on the XRP Ledger network performance, storage, and bandwidth. Collaborate with Project Eleven to perform validator-level tests and Devnet benchmarking, deploy NIST-standardized ML-DSA quantum-secure signature scheme, and develop a post-quantum custodial wallet prototype. Core engineer Denis Angell has already deployed ML-DSA signatures on XRPL's AlphaNet.

Stage 3: Devnet Hybrid Integration (Second Half of 2026). Concurrently integrate candidate post-quantum signature schemes with existing elliptic curve signatures on the Developer Network (Devnet), allowing developers to test performance and system impacts without affecting the mainnet. Explore post-quantum zero-knowledge proof primitives and homomorphic encryption techniques for Confidential Transfers, advancing XRPL's privacy and compliance capabilities for tokenizing real-world assets.

Stage 4: Mainnet Full Upgrade (Target 2028). Submit a formal Protocol Amendment, and upon validator approval, enable native post-quantum cryptography on the mainnet. Emphasis on production readiness optimization: throughput tuning, validator reliability assurances, and ecosystem-coordinated migration to ensure a seamless transition without compromising network speed and settlement finality.