Ripple Unveils Quantum Roadmap for XRP Ledger by 2028

TLDR

• Ripple introduced a four-phase roadmap to transition the XRP Ledger to quantum-resistant cryptography by 2028.
• Ripple said it will begin testing NIST-standardized post-quantum algorithms in the first half of 2026.
• Ripple plans to deploy hybrid signature schemes on Devnet in the second half of 2026.
• Ripple stated that Phase 4 will deliver a production-ready network amendment enabling post-quantum security.
• Ripple cited Google Quantum AI research that warns current blockchain cryptography could face future quantum risks.

Ripple has introduced a four-phase roadmap to prepare the XRP Ledger for quantum computing threats. The company said it will complete the transition to quantum-resistant cryptography by 2028. Ripple stated that it will act early as quantum research advances and long-term risks increase.

Ripple Sets Phased Plan to Protect XRP Ledger

Ripple outlined two parallel goals to guide the transition and maintain network stability. The company will protect operational integrity while building contingency measures for accelerated quantum threats. Ripple confirmed the roadmap in a blog post published on April 20.

Ripple said that quantum risk is not immediate but credible enough to require action. The company cited research from Google Quantum AI on cryptographic weaknesses. It stated that current blockchain signatures could fail against powerful quantum machines.

Ripple also warned about the “harvest now, decrypt later” threat. It explained that attackers can collect encrypted blockchain data today and decrypt it later. The company said that long-term asset holders face exposure under that scenario.

Ripple said these risks require structured preparation across performance and storage systems. It also referenced protocol design and usability planning in the roadmap. The company emphasized that proactive planning will reduce disruption.

Four-Phase Strategy Targets 2028 Migration

Phase 1 establishes a Quantum-Day response framework for XRP Ledger. Ripple said the network would enforce a hard migration from classical public-key signatures. It added that post-quantum zero-knowledge proofs would support secure fund recovery.

Phase 2 will begin in the first half of 2026 with formal testing. Ripple will experiment with NIST-standardized quantum-resistant algorithms under live workload conditions. It will benchmark signature size, verification cost, and throughput impact.

Ripple is working with Project Eleven during this phase. The collaboration covers validator-level testing and Devnet benchmarking. It also includes the development of a post-quantum custody wallet prototype.

Phase 3 will launch in the second half of 2026 on Devnet. Ripple will deploy hybrid signatures that combine post-quantum and elliptic curve cryptography. The company will also test post-quantum primitives for zero-knowledge proofs.

Ripple said it will examine homomorphic encryption for tokenization use cases. It referenced Confidential Transfers for multi-purpose tokens in this context. The company stated that hybrid deployment will support gradual adaptation.

Phase 4 targets a production-ready upgrade by 2028. Ripple will introduce a new XRPL network amendment to enable post-quantum cryptography. The company will focus on throughput optimization and validator coordination.

Ripple noted that XRPL supports native key rotation and seed-based key generation. It said these features provide a structural advantage over Ethereum at the protocol level. The company contrasted this with networks that lack built-in migration tools.

Projects such as QRL and Abelian adopted quantum-resistant models from inception. Ripple, along with Algorand and Solana, is integrating quantum-safe features over time. Google researchers referenced these efforts in related findings.

The Ethereum Foundation has also increased work on quantum resilience. Ripple stated that coordinated preparation will strengthen network security. The roadmap outlines actions through 2028 as quantum research continues to evolve.

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