Ethereum unveils quantum-safe accounts, with a costly catch

Ethereum research group Ethlabs has proposed giving users a route to quantum-resistant accounts before Ethereum can process those transactions at full scale.

Its Nov. 11 plan would let users adopt the protection earlier, but their quantum-enabled transactions would cost more than ordinary transactions because they take up more space.

The proposal pqai27 targets readiness for quantum-resistant accounts and consensus in 2027. Full-capacity support is a stretch goal for that year, and the target remains a proposal.

At “pqai-ready,” Ethereum would have post-quantum consensus and every user would have a post-quantum route for their account. At “pqai-scaled,” it would support full-capacity quantum-enabled transactions and blobs, the data objects used by rollups.

The first stage would allow users to migrate to post-quantum accounts and transact with a larger footprint. Signature aggregation and post-quantum data availability would provide the later path to full scale.

Compare the proposed routes

At readiness, wallet support enables account migration and higher-cost post-quantum transactions.

Early protection would carry a transaction cost premium; full scale needs additional protocol work.

The 2027 goal is a proposal; full scale is a stretch goal. Wallet migration is separate work. The proposal supplies no numerical fee premium, and full-capacity support does not establish fee parity.

Sources and evidence

Sources

1. Ethlabs’ November 11 pqai27 proposal

Supporting facts

• Reported statement Ethlabs proposed on November 11 that Ethereum prioritize post-quantum and plausibly post-AI readiness in 2027, calling the goal pqai27. [1]
• Ethlabs distinguishes pqai-ready, with post-quantum consensus and an account route for every user, from pqai-scaled, with full-capacity post-quantum transactions and blobs; it calls the latter a stretch goal for 2027. [1]
• Under Ethlabs’ proposed readiness stage, users could migrate to post-quantum-secure accounts and make quantum-enabled transactions at higher cost because those transactions have an increased footprint. [1]
• Ethlabs proposes signature aggregation and post-quantum data availability for the full-scale stage, enabling quantum-enabled transactions at the scale of ordinary transactions and rollups to use post-quantum blobs. [1]
• Ethlabs’ readiness proposal offers rollups a fallback to calldata from quantum-enabled transactions rather than quantum-secure blobs, and says the fallback would have a higher inclusion cost; it does not require rollups to switch. [1]
• Ethlabs says an orderly migration to secure accounts needs tooling and wallet support outside the hardfork schedule. [1]

Method

Conceptual dependency diagram using Ethlabs’ proposed stages and account/rollup routes. Arrows express dependencies and sequencing, not measured capacity, fee amounts or fixed activation dates. No quantitative calculations.

Scope

The 2027 goal is a proposal; full scale is a stretch goal. Wallet migration is separate work. The proposal supplies no numerical fee premium, and full-capacity support does not establish fee parity.

Infographic by CryptoSlate

Ethlabs proposes an optional fallback to calldata from quantum-enabled transactions, carrying their data in regular blocks before post-quantum blobs are available.

A new Ethereum account route needs wallet support

Ethlabs places an orderly user migration, including tooling and wallet support, outside the network upgrade schedule. Protocol readiness would leave practical work for wallets and users before adoption is complete.

Draft EIP-8141, known as Frame Transactions, provides part of the proposed foundation. It would let account code define how transactions are validated and how gas is paid, creating a native route away from today's elliptic-curve signatures and supporting key rotation.

Ethlabs’ plan pairs Frames with the SPHINCS post-quantum signature scheme and other account proposals. Upgrading consensus remains a separate, substantial task, with the choice of design unresolved.

Ethereum.org’s Hegotá roadmap, last updated Oct. 16, lists Frames as scheduled for inclusion in that upgrade, which remains in planning with an unconfirmed date. That earlier listing is separate from Ethlabs’ new proposal for broader quantum readiness in 2027.

Ethlabs says it will withdraw its Quick Slots proposal for faster slots from Hegotá and redirect its resources toward pqai27.

For users considering the proposed account route, the practical milestones are wallet migration support and the cost of quantum-enabled transactions, followed by the aggregation and data upgrades needed to use them at full scale.