SKN | XRP Ledger Plans Quantum-Resistant Accounts by 2028 Without Increasing User Transaction Fees

Key Points:

• The XRP Ledger Foundation has proposed allowing account holders to add quantum-resistant signing keys and deactivate their existing keys, addressing a potential long-term vulnerability.
• The proposed ML-DSA-44 cryptographic keys and signatures would occupy 3,732 bytes, compared with 105 bytes for a conventional payment, while the network’s base transaction fee would remain unchanged.
• A migration study is scheduled for the first half of 2027, with development and security audits expected to follow as Ripple targets a full post-quantum transition by 2028.

The XRP Ledger (XRPL) is advancing plans to protect user accounts against potential future attacks from sufficiently powerful quantum computers, introducing a proposed account design that would not increase standard transaction fees. The initiative reflects a growing recognition across the digital-asset industry that blockchain security must evolve alongside advances in computing. For institutional investors, exchanges and long-term asset holders, the proposal addresses a significant infrastructure question: how to protect digital ownership without disrupting an established financial network.

Quantum-Resistant Keys Address an Existing Cryptographic Exposure

The XRP Ledger Foundation’s updated 2027 protocol roadmap outlines a design that would allow account owners to attach a quantum-resistant signing key and subsequently disable their original key. The objective is to reduce exposure to a future quantum computing threat that could undermine the cryptographic methods currently used to secure blockchain accounts.

Each time an XRPL account signs a transaction, its public key becomes visible on the blockchain. A sufficiently advanced quantum computer could theoretically use that information to derive the private key controlling the account. Consequently, accounts that have previously sent payments, including exchange wallets, have already exposed their public keys.

The proposed solution uses ML-DSA-44, a post-quantum signature scheme standardized by the U.S. National Institute of Standards and Technology in 2024. Once an account has established its replacement key, disabling the original would close the specific exposure associated with the older cryptographic method.

Unchanged Fees Come With Higher Infrastructure Requirements

One of the proposal’s notable features is that users would not pay higher base transaction fees to access the additional protection. However, the cryptographic upgrade introduces a substantial increase in data requirements.

The new public key and signature together occupy approximately 3,732 bytes, compared with 105 bytes for a conventional payment. Including transaction history and database overhead, the Foundation estimates storage requirements of 5,331 bytes per protected payment, against a baseline of 1,704 bytes.

This additional storage burden would fall on network operators rather than being reflected in a higher base fee. Because XRPL transaction fees are destroyed rather than paid directly to validators, maintaining the existing fee structure means operators must account for the additional infrastructure requirements. The proposal therefore preserves the stated user-fee structure while introducing operational considerations for the network.

Development and Testing Remain Important Obstacles

The proposal is not yet production-ready. Developers are addressing an inconsistency in which Python prototypes and server-side and JavaScript implementations can generate different keys from the same starting seed. The Foundation has also not published testing results demonstrating how the network performs when all validators use the proposed signatures.

The roadmap allocates approximately $215,000 to $255,000 for reviewing and auditing this amendment, alongside 640 hours of development work. Across all 24 amendments included in the roadmap, the estimated budget ranges from approximately $5 million to nearly $6 million.

The migration study is scheduled for the first half of 2027, with further development and auditing expected in late 2027 or 2028. Ripple’s broader post-quantum strategy similarly targets full network readiness by 2028. These milestones remain dependent on technical validation, security reviews and coordination across the XRPL ecosystem.

Institutional Security Becomes a Long-Term Competitive Consideration

For institutional participants, quantum readiness is not simply a technical upgrade. Exchanges, custodians and financial institutions holding substantial digital-asset balances need credible migration procedures that protect ownership while maintaining transaction reliability. A structured transition could help address these requirements, although the proposed design must still demonstrate that it can operate securely and efficiently at network scale.

The quantum threat does not mean existing XRP accounts are currently being compromised. Rather, the proposal reflects preparation for a future technological risk whose timing remains uncertain. Investors should therefore distinguish between a developing security roadmap and an implemented protection mechanism.

The next important indicators will be the 2027 migration study, validator performance testing and the results of independent security audits. If the proposed system meets its technical requirements, the XRP Ledger could move closer to a network-wide post-quantum transition by 2028. Its significance for the broader crypto industry will depend on whether this preparation can be translated into reliable protection without compromising the performance and operating economics of the ledger.