Although quantum computers do not practically pose a major threat to blockchains yet, some projects have already begun to take steps against this possibility. Ripple, one of the leading companies in the cryptocurrency world, announced a four-stage roadmap to make XRP Ledger (XRPL) resistant to quantum attacks. The company aims to make XRP, XRPL’s native asset, fully quantum secure by 2028. As it is known, Ripple effectively uses the XRP Ledger infrastructure and XRP token while providing blockchain-based financial solutions.
Quantum computer threat and risk of XRP Ledger
According to Google’s recent warnings, quantum computers can attack large blockchains such as Bitcoin with less processing power than thought. In response, the developers highlighted 2029, the so-called “Q-day,” as the date by which the defenses should be completed. While precautions are taken against these risks on the Bitcoin side, similar concerns remain valid for XRP Ledger.
The main risks posed by quantum computers on XRPL are collected under three headings. First of all, public keys appear on-chain in XRPL users’ transactions. Although this information normally does not threaten security, thanks to quantum computers, it may become possible to access the private key, which may result in the seizure of assets. In addition, while the possibility of endangering accounts that hold assets on the blockchain for a long time increases, it is emphasized that system-wide measures require major adjustments in terms of operational as well as technical aspects.
Ripple’s four-step security plan
Ripple plans to improve XRPL security in four main phases. The first step is based on immediate intervention. Here, if quantum computers come into play faster than expected, a regulation is envisaged in which classical signatures will not be accepted and all funds will be transferred to quantum-secure accounts. In addition, new solutions are being researched to ensure that account holders can protect their assets in times of danger through “zero knowledge proof” techniques.
The second phase has already started and is planned to end in the first half of 2026. During this period, Ripple’s cryptography team is tasked with detecting all quantum vulnerabilities in XRPL and testing the defense techniques prescribed by the US National Institute of Standards and Technology. However, these solutions bring additional burden to Ledger; because post-quantum cryptography requires larger keys and signatures. Ripple is also evaluating what changes should be made to the system.
In this process, cooperation was made with Project Eleven, a company working in the field of quantum security. The company provides support with validator testing, developer benchmarks, and new wallet prototypes.
The third phase will be implemented in the second half of 2026. Here, Ripple will allow the use of both existing and quantum-secure signatures together on the developer testnet. This method staggers the migration process so that the live system and users are not affected.
“This phase will be the point where the system design and testing process meet. We are questioning not only what works cryptographically, but also what is functional at the XRPL scale,” the team conveys the importance of the process.
The last and fourth step covers the transition from trials to full use. By proposing a new change for XRPL, the Ripple team plans to use post-quantum cryptographic signatures across the entire network and begin the transition on a mass scale. This step is aimed to be completed in 2028.
This entire four-stage plan aims to enable XRPL users to navigate potential threats with less hassle as Q-day approaches. Ripple’s roadmap has the potential to pioneer industry-leading security solutions.
