The Ethereum Foundation has formed a dedicated Post-Quantum team to address emerging threats from quantum computing. Led by Thomas Coratger, the initiative focuses on upgrading the network's cryptographic foundations before potential risks materialize. This move reflects a broader shift in the blockchain ecosystem toward proactive defenses.
In early January 2026, the Ethereum Foundation took a significant step by formally prioritizing post-quantum security, establishing a specialized Post-Quantum (PQ) team to spearhead research and upgrades. This team, under the leadership of Thomas Coratger, aims to safeguard the network's consensus layer, which currently relies on cryptography vulnerable to future quantum advances.
Quantum computing, once viewed as a remote concern for blockchain systems, is now transitioning into practical engineering challenges, according to Coratger. "Quantum computing is moving from theory into engineering," he stated. "That changes the timeline, and it means we need to prepare."
The foundation's efforts center on Ethereum's signature system, which efficiently handles validator approvals but lacks post-quantum equivalents with similar efficiency. To tackle this, developers are creating leanVM, a tool designed to aggregate post-quantum signatures into compact proofs without straining the blockchain. Coratger noted, "We already have test networks running with post-quantum signatures."
While Ethereum faces no immediate threats, the team emphasizes preparation to avoid disruptions. "The worst-case scenario is that quantum computers arrive and we’re not ready," Coratger warned. Rapid scientific progress underscores the urgency: "New breakthroughs are happening all the time," he added. "Sometimes it’s hard to keep up."
This initiative aligns with wider industry actions. Coinbase has formed a quantum advisory board with cryptographers, and Optimism, a major Ethereum layer-2 network, outlined a 10-year roadmap to integrate post-quantum cryptography across its Superchain infrastructure. These developments signal that post-quantum security is evolving from theoretical discussions to essential engineering priorities in the Ethereum ecosystem.
