Ethereum Proposal Pulls Post-Quantum Target to 2027
Ethlabs' pqai27 proposal is research-stage and would need core developer adoption before any change reaches the network.
Updated on Nov. 12, 2026 in Quantum Computing
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Ethlabs, a nonprofit founded by former Ethereum Foundation researchers, has proposed advancing Ethereum's post-quantum upgrade, called pqai27, to 2027. The proposal was posted on the Ethereum Magicians forum, and Ethlabs said it would withdraw quick slots from the Hegotá hard fork to dedicate resources to pqai27. The proposal is research-stage and has not been adopted or shipped.
Why it matters
Ethlabs said AI is accelerating quantum and cryptographic risk timelines, making those threats harder to forecast, and argued that a later pivot during an already-planned fork would cost far more than acting now. The proposal follows a U.S. government move to shift its quantum risk goal from 2035 to 2030, and comes as Ethereum's own prior target for full post-quantum readiness was December 2029.
The proposal defines two stages: pqai-ready, in which consensus is post-quantum with a post-quantum account route while the network continues at scaled capacity, and pqai-scaled, in which the network runs at full capacity with post-quantum transactions and data availability. Ethlabs cites AI-found vulnerabilities, including roughly 1,000 in Linux, as evidence that threat timelines are compressing, though the stub does not establish how those findings bear on Ethereum's cryptography specifically.
The players
Ethlabs
A nonprofit founded by former Ethereum Foundation researchers that launched earlier this year to conduct Ethereum research and development, and which said Ethereum already has a dedicated post-quantum team.
The details
Post-quantum cryptography refers to signature and encryption schemes designed to resist attacks from quantum computers, which could eventually break the elliptic-curve cryptography that blockchains such as Ethereum rely on to verify transactions. Ethlabs' proposal sets two milestones: pqai-ready, where the consensus layer is post-quantum and users can access a post-quantum account route while the network keeps operating at reduced capacity, and pqai-scaled, where full throughput is restored with post-quantum transactions and data availability. Ethlabs said it has become much harder to reason about when quantum and cryptographic threats will arrive, given AI's acceleration of both research and vulnerability discovery.
Timeline
December 2029 — the Ethereum Foundation's earlier target for full post-quantum readiness.
2027 — the target year proposed in pqai27.
The Tech Race
Google has set 2029 as its post-quantum target, and the U.S. government has moved its quantum risk goal from 2035 to 2030. Ethlabs' 2027 proposal would place Ethereum ahead of both timelines, though the stub does not establish whether any other blockchain has announced a comparable schedule.
The pqai27 proposal is not yet adopted, so no Ethereum user will see changes from it in the near term. If accepted, it would reshape how Ethereum accounts and transactions are secured, with a post-quantum account route offered during the pqai-ready stage.
The takeaway
The central trajectory is that AI-driven acceleration is pulling quantum-security deadlines forward across the industry. Readers should watch whether Ethereum core developers respond to the pqai27 proposal on the Ethereum Magicians forum and whether the 2027 target is adopted or revised.
Further reading
For background on the cryptographic threat driving this proposal, see the Quantum Computing section.
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