Although quantum computers have yet to present a practical threat to blockchain networks, several projects have started to prepare for this looming risk. Leading crypto company Ripple announced a four-stage roadmap to make the XRP Ledger (XRPL) resilient against quantum attacks, aiming to fully secure the network’s native asset XRP by 2028. Ripple, known for its blockchain-based financial solutions, extensively utilizes both the XRP Ledger infrastructure and XRP token in its services.
The quantum computer risk facing the XRP Ledger
Recent warnings from Google suggest that quantum computers could potentially attack major blockchains like Bitcoin with far less computational power than previously assumed. Developers have highlighted 2029 as “Q-Day”—the point at which defenses against quantum threats must be completed. While Bitcoin’s community is already preparing countermeasures, similar concerns are increasingly relevant for the XRP Ledger.
Experts cite three primary risks that quantum computers pose to XRPL. Firstly, public keys are visible on the ledger when XRPL users make transactions. Normally, this is not a security issue, but quantum computing could enable bad actors to derive private keys from these public records, risking asset theft. Additionally, accounts that have held assets on the chain for long periods are especially vulnerable, and both technical and operational adjustments are required across the entire system to handle the threat.
Ripple’s phased security upgrade plan
Ripple’s four-stage approach starts with an emergency protocol. If quantum computers arrive sooner than expected, the plan foresees classic signatures being rendered invalid and all funds rapidly migrating to quantum-safe accounts. The company is also exploring new solutions, such as “zero-knowledge proofs,” to allow account holders to protect their assets even during such high-risk periods.
The plan’s second stage is already underway, scheduled to conclude in the first half of 2026. During this period, Ripple’s cryptography team is conducting a comprehensive audit of quantum vulnerabilities within XRPL and testing defensive measures recommended by the US National Institute of Standards and Technology. However, these solutions could present new technical challenges, since post-quantum cryptographic systems generally require larger keys and signatures. An assessment of necessary modifications to the system is ongoing.
As part of this process, Ripple is partnering with Project Eleven, a specialist in quantum security, to support validator testing, developer benchmarks, and prototype new wallet designs. Their collaboration aims to accelerate the development and implementation of quantum-resistant features on the XRPL.
The third stage of the roadmap will be rolled out in the second half of 2026. Here, Ripple will allow both standard and quantum-safe signatures to run side by side within a developer test network. This staggered approach is designed to ensure a smooth transition for users and limit any disruptions to live systems.
“This phase is where system design meets practical testing. Beyond what works cryptographically, we’re also questioning what is truly functional at XRPL’s scale,” the project team emphasized.
The fourth and final stage involves a full-scale rollout of quantum-resistant signatures across the entire network. Ripple intends to propose an amendment for XRPL that would enable mass migration to these advanced cryptographic models, with a targeted completion date of 2028.
The comprehensive four-stage strategy is designed to ensure that XRPL users can navigate quantum-related threats with minimal disruption, as Q-Day draws near. Ripple’s roadmap sets the company up as a leader in advancing industry-wide security standards against next-generation computing risks.
