Ethereum Foundation Plans to Integrate Quantum Security Measures by 2029
March 26, 2026
The Ethereum Foundation recently announced plans to implement quantum security measures by 2029 through a series of four hard forks. According to developers, quantum computers capable of compromising cryptographic systems are not expected to emerge for another 8 to 12 years. However, proactive measures need to be taken now to ensure the network’s security in the future.
The foundation emphasized the importance of starting work on quantum security before it becomes a real threat. Quantum computing has the potential to break the public-key cryptography that currently secures digital systems for ownership, authentication, and consensus. This necessitates a preemptive approach to protecting the Ethereum network.
The proposed roadmap includes four key updates that will enhance the network’s resilience against quantum threats. The first update, known as Fork I, will provide network validators with a public key that can be activated in the event of a sudden emergence of a quantum computer. Fork J will focus on reducing gas costs for verifying secure signatures, while Fork L will compress the network’s ability to express blockchain state in zero-knowledge proofs. Lastly, Fork M aims to protect layer 2 networks from potential quantum threats.
Developers are currently evaluating the first two updates for inclusion in the upcoming Hegota hard fork, which is expected to take place this year. The transition to quantum security will impact all three levels of the Ethereum protocol: execution level, consensus level, and data storage level.
At the execution level, a shift towards quantum-safe authentication through account abstraction will be enabled without mandatory updates. The consensus level will see the replacement of the validator signature scheme with post-quantum alternatives like hash-based signatures. To address the lack of aggregation properties in post-quantum signatures, a SNARK-based aggregation approach using minimal zkVM is being developed. Lastly, the data storage level will ensure post-quantum security for handling BLOB objects.
The Ethereum team aims to complete the network overhaul by 2029, although full migration to quantum-resistant systems will likely take several additional years. Ethereum co-founder Vitalik Buterin had previously announced significant updates to encryption algorithms and transaction verification methods to enhance the network’s security against quantum threats. The foundation’s proactive approach to quantum security highlights the importance of staying ahead of potential risks in the rapidly evolving landscape of digital systems and cryptography.
