Ethereum Foundation sets December 2029 deadline for quantum-resistant network upgrade

The Ethereum Foundation Protocol cluster has set a non-negotiable December 2029 deadline to make the Layer 1 network fully quantum-resistant across its execution, consensus, and data layers. This aggressive timeline, aligned with tech giants like Google and Microsoft, plans for a potential 'Q-day' as early as 2030. To achieve this, Ethereum must execute five hard forks after the late 2026/2027 Hegotá upgrade, maintaining a rapid 7.2-month average cadence. Hegotá's scope is heavily constrained to protect key post-quantum foundations like Frame Transactions (EIP-8141) and FOCIL (EIP-7805).

December 2029 quantum-resistance deadline

• ▪The Ethereum Foundation's December 2029 quantum-resistance timeline aligns with independent post-quantum migration targets established by Google, Cloudflare, and Microsoft.
• ▪The Ethereum Foundation Protocol cluster has set a December 2029 deadline to make the Ethereum Layer 1 network fully quantum-resistant across its execution, consensus, and data layers.
• ▪The Ethereum Foundation plans to treat the December 2029 deadline as non-negotiable until at least January 2027, when quantum computing progress will be reassessed alongside outside experts.
• ▪The Ethereum Foundation's Protocol cluster stated that the Ethereum network should plan for 'Q-day'—the point when quantum computers can break public-key cryptography—occurring as early as 2030.

Hegotá upgrade scope constraints

• ▪The upcoming Hegotá upgrade, scheduled for late 2026 or 2027, is designed to establish the technical foundation to ensure subsequent post-quantum upgrades remain on schedule.
• ▪The Ethereum Foundation's Protocol cluster has indicated that its appetite for additional consensus-layer development beyond FOCIL is close to zero unless it directly supports the post-quantum roadmap.

FOCIL censorship-resistance proposal

• ▪The Fork-Choice Enforced Inclusion Lists proposal, designated as EIP-7805, is a protected S-tier headliner for the Hegotá upgrade designed to strengthen censorship resistance.
• ▪The Fork-Choice Enforced Inclusion Lists proposal allows a validator committee to mandate the inclusion of valid public-mempool transactions, preventing dominant block builders from censoring them.

Frame Transactions account abstraction

• ▪Frame Transactions splits transactions into programmable frames for validation, gas payment, and execution, allowing wallets to use custom signatures and batched actions without offchain operators.
• ▪Frame Transactions, designated as EIP-8141, is an S-tier headliner for the Hegotá upgrade designed to make account abstraction native to Ethereum and improve post-quantum readiness.

62 EIP tier-list evaluation

• ▪The Ethereum Foundation Protocol cluster published a unified tier list evaluating 62 Ethereum Improvement Proposals for the upcoming Hegotá upgrade.
• ▪The Hegotá tier list incorporated 397 individual assessments from approximately 60 researchers, engineers, and specialists across nine Protocol Cluster teams.

Five-fork post-quantum roadmap

• ▪Achieving full quantum resistance by December 2029 requires an aggressive average cadence of 7.2 months per hard fork, leaving minimal margin for development delays.
• ▪The Ethereum Foundation plans to execute five hard forks after the Hegotá upgrade to fully deploy post-quantum cryptography across the network by December 2029.
• ▪The Ethereum Foundation has designed a fallback contingency path called minimum viable post-quantum protection at milestone J* to keep the network operating with reduced guarantees if Q-day occurs early.