Ethlabs, the Ethereum research nonprofit behind the push for faster blocks, has asked core developers to make Ethereum post-quantum in 2027 and is withdrawing its own Quick Slots proposal from the next hard fork to help get there. The group set out the plan, which it calls pqai27, in a post on the Ethereum Magicians forum on Wednesday. It argues that AI is pulling quantum and cryptography risks forward faster than anyone can date them, and that the Hegotá upgrade should be rebuilt around that.
What Ethlabs is proposing
The target has two tiers. “pqai-ready” means Ethereum’s consensus is post-quantum and every user has a post-quantum route for their account, while the network keeps running at the capacity Glamsterdam delivers. If today’s cryptography broke early, Ethereum could switch over and keep going at reduced capacity. “pqai-scaled,” a stretch goal for 2027, means post-quantum transactions and blob data at full capacity.
The “post-AI” half is newer language. Ethlabs uses it to mean cryptography that holds up against possible cryptanalysis breakthroughs, and client software hardened against AI models that find bugs at scale. The planned cryptography is built on hash functions, which the group says keeps the number of assumptions low enough to cover both threats.
The forum post was written by Ethlabs’ Caspar Schwarz-Schilling after a week with core developers at Devcon. Ethlabs, a nonprofit founded by former Ethereum Foundation researchers, launched this year, The Block reported. The group calls the plan input into Ethereum’s governance process. Core developers have not adopted it.
Why 2027 and not 2029
Ethlabs points to timelines elsewhere. The U.S. government moved its goal for dealing with quantum risk from 2035 to 2030, and Google now aims to be post-quantum by 2029, the post says. It also cites OpenAI finding and patching about 1,000 Linux vulnerabilities with an internal model, and AI systems solving hundreds of open maths problems. “The security of our cryptography is itself an open maths problem,” the group wrote.
The Ethereum Foundation had already brought its own post-quantum target forward from 2029 to 2028, according to Ethlabs. pqai27 would pull it in by another year. “You don’t have to believe in any single one of these threats,” the post says. “What has changed is that it has become much harder to reason when any of them will arrive.”
What gets cut from Hegotá
The plan has a cost, and Ethlabs is paying part of it. Quick Slots, EIP-8198, would start by cutting Ethereum’s 12-second block time to 10 seconds. Ethlabs researchers took it to core developers in August and campaigned for it with an ecosystem survey. Now the group says it will pull Quick Slots from Hegotá and aim for quicker slots in 2028 instead.
“We don’t take this decision lightly,” Ethlabs wrote. “We pushed for quick slots because our survey showed that the community clearly wants them, and we are ready to defend this decision to the people who trusted us to deliver them.”
FOCIL, the censorship-resistance feature that is currently Hegotá’s consensus-layer headliner, is also in question. Ethlabs says it should be scheduled only in a way that keeps the 2027 goal alive, even though many of its researchers co-authored it. Without FOCIL, the execution layer could ship Frames, the account upgrade already slated as a Hegotá headliner, with the SPHINCS post-quantum signature scheme on its own, without waiting for the consensus layer. The consensus side would work separately on post-quantum consensus. The biggest open question is whether to retrofit the current Gasper protocol or move straight to a new decoupled design.
Glamsterdam, the upgrade before Hegotá, ships as planned. Ethereum Foundation researchers this month listed eight contract assumptions Glamsterdam would break, so the pqai27 debate lands on top of an already busy schedule.
What users and validators would have to do
Being pqai-ready does not make old accounts safe by itself. Users would need to migrate to post-quantum accounts, and post-quantum transactions would cost more at first because the signatures are larger. Rollups could fall back to posting data as calldata, since blobs are not yet post-quantum. Validators would need to pre-register and move to post-quantum keys, with tooling for both institutional and home stakers. Full-capacity post-quantum data and signature aggregation would wait for the fork after Hegotá.
Early reaction on X was mostly supportive. Ethereum advocate Ryan Berckmans summed up the trade as making Hegotá’s headliners post-quantum and Frames while “pausing FOCIL,” which he called “sad but important.” The forum thread itself had no replies when we checked.
What to watch
The decision belongs to the All Core Devs process. The next signals are whether client teams and Ethereum Foundation researchers back a 2027 date, whether FOCIL’s champions accept a delay, and whether the consensus layer picks Gasper or a decoupled design.
FAQ
Is Ethereum vulnerable to quantum computers today?
No machine capable of breaking Ethereum’s signatures is known to exist. Ethlabs argues the arrival date has become harder to predict, so the network should be ready earlier.
Does pqai27 delay faster Ethereum blocks?
Yes, under Ethlabs’ plan. The group is withdrawing Quick Slots, which would cut block times from 12 to 10 seconds, from Hegotá and now aims for quicker slots in 2028.
Will ETH holders need to move their funds?
Eventually, users would need to migrate to post-quantum accounts. Ethlabs calls for wallet tooling and an orderly migration path, but no schedule has been set.
Disclaimer: This article is for informational purposes only and does not constitute financial advice.
