Ethereum Establishes "Post-Quantum Security" Task Force, to Complete Protocol-Layer Upgrade Before 2029, SNARK to Prevent Performance Collapse

Ethereum Foundation members officially launched the “Post-Quantum Ethereum” resource center on Tuesday, announcing plans to integrate quantum-resistant solutions at the protocol layer by 2029; the team admits that upgrading hundreds of millions of accounts and preventing migration from introducing new vulnerabilities will be the real challenge.
(Background: Are quantum computers capable of cracking Bitcoin already in development? Nvidia-backed PsiQuantum aims to commercialize next year.)
(Additional context: Quantum computing won’t kill cryptocurrencies; it will push them to become even stronger.)

The Ethereum community’s response to the quantum threat has moved from discussion to practical deployment. Ethereum Foundation members officially launched the dedicated “Post-Quantum Ethereum” resource website this Tuesday (March 25), setting a clear goal to achieve quantum resistance at the protocol layer by 2029, with layer-2 solutions to follow.

The team left a definitive statement on the website: “Migrating a decentralized global protocol takes years of coordination, engineering, and formal verification. This work must begin before the threat actually arrives.”

SNARK is the first line of defense—prioritize performance before resisting quantum

The post-quantum team’s top technical priority is integrating SNARKs (Zero-Knowledge Succinct Non-Interactive Arguments of Knowledge) into the Ethereum protocol. The core purpose of this design is to prevent significant network performance degradation after adopting quantum-resistant signature schemes.

The difference in gas costs illustrates why this is a difficult challenge: current ECDSA signature verification requires about 3,000 gas, ZK-SNARK verification has risen to 300,000–500,000 gas, and quantum-resistant STARK verification is estimated to cost up to 10 million gas. Upgrading without sacrificing network throughput is the key challenge of the entire plan.

Quantum-resistant solutions will cover Ethereum’s consensus layer, execution layer, and data layer. Vitalik also pointed out four vulnerable areas in his quantum roadmap: BLS signatures at the consensus layer, KZG commitments, ECDSA signatures, and zero-knowledge proof systems themselves. The EIP-8141 proposal introduces a “verification framework” under this structure, allowing each transaction to include a validation frame that can be verified by STARKs.

The real challenge isn’t choosing the algorithm, but securely migrating hundreds of millions of accounts

The team straightforwardly highlights non-technical challenges: “Choosing a post-quantum algorithm is only part of the challenge. More difficult issues include securely upgrading hundreds of millions of accounts, preventing new vulnerabilities during migration, avoiding creating new attack surfaces, maintaining performance, and coordinating ecosystem-wide adoption.”

In terms of upgrade priority, the team considers the standard Ethereum wallets used by ordinary users as the primary protection target, followed by high-value institutional wallets, including those linked to exchanges, cross-chain bridges, and custodial infrastructure.

How big is the threat? Industry debates continue

There is currently significant disagreement within the crypto industry about the actual threat boundary of quantum computing. Will Owens of Galaxy Digital believes only wallets with publicly exposed public keys face real risk; Charles Edwards of Capriole Investments takes a more pessimistic stance, claiming all on-chain assets are potentially threatened.

The post-quantum security team’s position is that there is no immediate quantum threat to cryptographically protected blockchains today. This is why they emphasize “early preparation” rather than “urgent response”—the complexity of implementation requires years of advance planning.

The 2027 quantum hardware timeline is a realistic reference for Ethereum’s 2029 goal

Ethereum’s post-quantum team was officially formed in January 2026. The resource center launch marks an important milestone in sharing progress with external developers and the research community.

This timeline is not arbitrary. Nvidia-backed PsiQuantum is building a million-qubit quantum facility in Chicago, expected to go into commercial operation by 2027; ARK Invest’s white paper estimates that about 35% of Bitcoin could be at risk due to exposed public keys in the quantum era. If Ethereum waits until quantum hardware is truly mature to start migration, the window for coordination and verification will be extremely limited. The ETH 2030 upgrade plan already includes six new signature schemes, 13 EVM precompiles, and recursive STARK aggregation, making post-quantum security a core focus for Ethereum’s next five years of development.