Ethereum prepares for quantum era with new security strategy

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Sergey Shendetskyi

25.03.2026

Ethereum prepares for quantum era with new security strategy — Ethereum upgrades network protection

Ethereum developers have launched a dedicated resource hub focused on protecting the network from potential threats связанных with the advancement of quantum computing. In essence, the initiative is about safeguarding an ecosystem that already holds billions of dollars in assets and continues to grow through DeFi and smart contracts.

The Post-Quantum Ethereum platform, introduced by members of the Ethereum Foundation, marks a practical step toward updating the protocol. Unlike the incremental upgrades of previous years, the focus now is on preparing the network for fundamental shifts in how information is processed.

Transition to post-quantum cryptography

The Post-Quantum team plans to implement quantum-resistant solutions at the protocol level by 2029, followed by gradual adoption at the execution layer. This approach предполагает phased migration affecting all core components of the network — from consensus to data handling.

“Ethereum is designed to serve as resilient, self-sovereign infrastructure — not for decades, but for centuries. Security is one of its non-negotiable properties: things must do what they claim to do, no more and no less. That commitment extends to ensuring Ethereum can withstand fundamental shifts in how the universe processes information.”

A key principle behind the strategy is the ability to upgrade cryptographic mechanisms without destabilizing the network. At the same time, the transition will require coordination, testing, and staged implementation.

“Quantum computing will eventually break the public-key cryptography that secures ownership, authentication, and consensus across all digital systems. We do not believe a cryptographically relevant quantum computer is imminent. But migrating a decentralized, global protocol takes years of coordination, engineering, and formal verification. The work must begin well before the threat arrives.”

What will change at the protocol level

The changes will affect multiple layers. At the execution level, users will be able to transition to new signature schemes via account abstraction without disrupting network operations. At the consensus level, a gradual shift away from BLS signatures toward alternatives such as hash-based schemes like XMSS is being considered, with SNARK-based solutions helping to maintain scalability.

Another area of focus is data handling. Developers are testing approaches to ensure data availability under post-quantum cryptography. The roadmap is already structured into stages — from key registry implementation to a full overhaul of consensus.

Why it matters for the industry and users

For the market, this is more than a technical upgrade. Ethereum remains the leading platform for DeFi protocols, and any криптографические risks directly affect liquidity and user trust. According to DefiLlama, the total value locked in the network consistently stands in the tens of billions of dollars, making security a critical concern.

Interest in post-quantum security is expanding beyond the crypto sector. Standards in this area are already being developed, notably by the U.S. National Institute of Standards and Technology (NIST), while banks and major tech companies are beginning to factor such risks into their systems.

In this context, Ethereum’s actions amount to early preparation for potential shifts in cryptography rather than a reaction to an immediate threat. If executed smoothly, the transition could help the network maintain resilience in the face of new computing capabilities and serve as a reference model for other blockchains and financial platforms.

At the same time, the Ethereum Foundation is formalizing its governance approach. Earlier, the organization introduced the EF Mandate, a document outlining its role within the ecosystem and decision-making principles. Described as a mix of a charter, manifesto, and internal guide, it establishes the Foundation’s responsibility for the network’s long-term security and sustainability as it continues to grow.

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