Ripple Targets 2028 for Full Post-Quantum XRP Ledger Readiness
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Ripple has set a target of 2028 to fully prepare the XRP Ledger for the advent of post-quantum cryptography. The company is actively addressing a risk researchers now identify as “harvest now, decrypt later,” where current blockchain data is collected and stored for future exploitation once quantum computing power advances. To accelerate this critical development, Ripple is collaborating with Project Eleven on validator testing and early custody prototypes, moving beyond research into concrete solutions. Recent research from Google Quantum AI is bringing renewed attention to what quantum computing could mean for the crypto industry, highlighting the urgency for long-term security of digital assets on the XRPL. Quantum Threat to Blockchain Assets & XRPL Exposure The increasing power of quantum computing presents a credible, if delayed, threat to the cryptographic foundations of blockchain technology, prompting proactive measures from networks like the XRP Ledger (XRPL). While current encryption standards remain secure, researchers now recognize a distinct risk of “harvest now, decrypt later” attacks, where malicious actors collect encrypted blockchain data anticipating future decryption capabilities. This shifts the conversation from a purely theoretical danger to one demanding immediate attention, particularly for assets held over extended periods. Ripple is introducing a multi-phase roadmap aiming for full post-quantum readiness of the XRPL by 2028. This is not simply research; it’s a declared finish line, underpinned by collaboration with Project Eleven to accelerate development. Their work includes validator testing and the creation of early custody prototypes, demonstrating a commitment beyond theoretical exploration. XRPL already has the building blocks in place to support future migration, with a built-in user experience that makes upgrades easier over time. At the account level, XRPL supports native key rotation, which means users can move away from potentially vulnerable keys over time without needing to change their underlying accounts. This contrasts with most other blockchains, including Ethereum, where no protocol-native equivalent exists, and any post-quantum migration would require users to manually move assets to entirely new accounts or rely on advanced methods like smart wallets. XRPL’s seed-based key generation enables deterministic derivation of new keys, providing a practical migration path.
The team, including Dr. Oleg Burundukov and Dr. Aanchal Malhotra, alongside engineers like Denis Angell, is working on this as part of the roadmap. The initial phase of Ripple’s plan focuses on “Post-quantum recovery” (Q-Day readiness), a contingency plan to enable secure migration to post-quantum cryptography should current standards be compromised. This involves a potential “hard shift” where classical public-key signatures are no longer accepted, requiring funds to move to post-quantum secure accounts. One path being explored is using PQ-based zero-knowledge proofs to prove ownership of existing keys without exposing them, allowing users to migrate funds even in a compromised cryptographic environment. Subsequent phases involve assessing the full impact of post-quantum cryptography (PQC) on XRPL and expanding experimentation with industry-standard, NIST-recommended algorithms, and ultimately, a full transition to post-quantum signatures. Ripple is working with a cross-functional collaboration with its applied cryptography team to achieve this. The entire strategy emphasizes cryptographic agility, supporting multiple algorithms to adapt to the evolving post-quantum landscape, while prioritizing real-world performance and a seamless transition for all XRPL users. These capabilities, while not standalone post-quantum solutions, represent foundational building blocks that streamline the migration process. Ripple is introducing a multi-phase roadmap to prepare the XRP Ledger (XRPL) for a post-quantum future, with a target for full readiness by 2028. The final phase, targeting 2028, aims for a full transition to post-quantum cryptography at scale, emphasizing performance and throughput. Every time an account signs a transaction, its public key becomes visible onchain, and in a post-quantum world, that exposure could eventually be exploited. Multi-Phase Roadmap for Post-Quantum Recovery (Q-Day) This proactive stance is driven by recent research bringing renewed attention to the vulnerability of current cryptographic standards to sufficiently advanced quantum computers, impacting wallet security and transaction signatures. This initial phase prioritizes resilience and a clear path forward in the event of a cryptographic breach.
The team, including Dr. Oleg Burundukov and Dr. Aanchal Malhotra, alongside engineers like Denis Angell, is working on a parallel strategy: preserving XRPL’s current strengths while simultaneously preparing for potential quantum threats. Phase two, slated for the first half of 2026, involves a comprehensive assessment of quantum risk and expanded experimentation with NIST-recommended algorithms. Ripple is actively evaluating the architectural adjustments required to maintain network performance. Collaboration with Project Eleven is accelerating this process, with the development of a “proof-of-concept hybrid post-quantum signing implementation” including validator testing and a custody wallet prototype. The subsequent phases will see controlled integration of candidate PQC schemes alongside existing cryptography on Devnet for developer testing, followed by a full transition to PQC-based signatures by 2028. NIST Algorithm Testing & Devnet Implementation with Project Eleven The increasing threat of quantum computing is not a distant concern for blockchain technology; it’s driving immediate action to safeguard digital assets, with a target for full post-quantum readiness emerging for the XRP Ledger by 2028. While the potential for quantum computers to break current encryption standards has long been theorized, recent research from Google Quantum AI is bringing renewed attention to this risk, prompting Ripple to initiate a comprehensive, multi-phase roadmap. This is not merely theoretical preparation, but a planned transition for a complex technological shift. A particularly pressing danger lies in the “harvest now, decrypt later” tactic, where malicious actors are actively collecting encrypted blockchain data with the intention of decrypting it once sufficiently powerful quantum computers become available. Ripple’s response centers on a proactive approach, beginning with rigorous testing of National Institute of Standards and Technology (NIST)-recommended quantum-resistant algorithms. “We’re collaborating with Project Eleven to accelerate early experimentation,” the company states, highlighting the importance of external partnerships. Currently, the team, including Dr. Oleg Burundukov and Dr. Aanchal Malhotra, alongside engineers like Denis Angell, is working on Phase 2 of the roadmap, which involves a full assessment of quantum risk across the network and evaluating the impact of potential changes on transaction performance. Post-quantum cryptography introduces tradeoffs, particularly regarding key and signature sizes, and Ripple is actively evaluating the architectural adjustments required to maintain network performance. Ripple is actively testing a number of NIST-recommended schemes, not in isolation, but within the context of XRPL’s transaction model, to understand their real-world performance characteristics. This phase will see candidate post-quantum signature schemes integrated alongside existing elliptic curve signatures on the Devnet, allowing developers to evaluate performance and usability without disrupting the live network. Ultimately, Ripple aims to design a system that supports multiple NIST-standardized algorithms, ensuring cryptographic agility and adaptability as the post-quantum landscape evolves, while maintaining XRPL’s speed and reliability. We’re not treating post-quantum migration as a single software upgrade. It’s an architectural challenge touching performance, storage, usability, cryptography, and protocol design. Source: https://ripple.com/insights/post-quantum-readiness-on-the-xrp-ledger/ Tags: