Ripple Sets 2028 Target for XRPL Quantum Shift Plan

• Ripple outlines a four-phase plan to prepare XRPL for quantum threats, targeting full migration and network upgrade by 2028.

• Early phases focus on testing quantum-resistant algorithms and hybrid cryptography with partners like Project Eleven.

• XRPL’s key rotation and seed-based design support gradual migration, addressing long-term “harvest now, decrypt later” risks.

Ripple has outlined a multi-phase plan in April 2026 to prepare the XRP Ledger for quantum computing risks, targeting full readiness by 2028. The effort involves RippleX engineers, cryptography experts, and partners like Project Eleven. The roadmap responds to new findings from Google Quantum AI, which highlight growing risks to current blockchain cryptography systems.

The quantum threat is no longer theoretical, and the #XRPL is ahead of the curve.
Ripple just published a multi-phase roadmap toward post-quantum readiness by 2028. Thanks to built-in architecture like native key rotation, the ledger has a unique advantage in managing a secure,…

— 𝗕𝗮𝗻𝗸XRP (@BankXRP) April 20, 2026

Quantum Risk Drives Early Testing and Planning

According to Google Quantum AI research, current cryptographic systems could be broken by advanced quantum machines. These systems secure wallets, transactions, and digital assets across blockchains. While no immediate threat exists, researchers say preparation timelines now matter.

RippleX identified a related risk known as “harvest now, decrypt later.” In this scenario, attackers collect encrypted blockchain data today and wait for future decryption capabilities. For XRPL, this risk affects accounts that hold value over long periods.

XRPL Design Offers Migration Advantages

To address these concerns, XRPL already includes features that support gradual upgrades. Notably, the network allows native key rotation, enabling users to update keys without changing accounts. This structure helps users respond to growing security risks.

In addition, XRPL uses seed-based key generation for deterministic key management. This method allows users to generate new keys securely during transitions. While these features are not post-quantum solutions, they support future migration steps.

Four-Phase Roadmap Outlines Transition Path

Ripple structured its roadmap into four phases, beginning with contingency planning. The first phase focuses on a “Quantum-Day” response, enabling secure migration if current cryptography fails. This includes exploring zero-knowledge proofs to verify ownership without exposing keys.

Next, the first half of 2026 centers on testing quantum-resistant algorithms and assessing system impact. Ripple collaborates with Project Eleven on validator testing and custody prototypes during this phase.

In the second half of 2026, developers will test hybrid cryptographic models on Devnet. These models combine existing and quantum-resistant signatures to evaluate performance and usability.

Finally, Ripple targets a full transition by 2028 through a network-wide upgrade. This phase focuses on scalability, validator readiness, and maintaining XRPL performance during adoption.