TL;DR
- Quantum Deadline: Ethereum aims for full quantum resistance by December 2029, with developers preparing for an early Q-day scenario even though its timing remains uncertain.
- Hegotá Role: Ethereum uses Hegotá to determine whether upcoming quantum-security work can stay on schedule, with FOCIL and Frame Transactions leading the proposals for long-term protection.
- Fork Cadence: Ethereum’s roadmap targets post-quantum readiness at L, requiring a 7.2‑month fork cadence. At the same time, a fallback at J could keep the network operating through Q-day with reduced guarantees.
Ethereum is moving toward a quantum-resistant Layer 1 by December 2029, with the Protocol cluster outlining a multi-fork path as Hegotá enters its scoping phase. The push places post-quantum security alongside privacy, faster finality, state management and zkEVM development, while developers work within strict limits on expanding the next upgrade’s scope.
The Protocol Cluster has published two new posts:
Hegotá EIP Opinion Post and Tier List evaluates and grades all 62 EIPs proposed for Hegotá, providing the cluster’s first unified tier list for a network upgrade
Current and Emerging Priorities covers commitments and research… pic.twitter.com/GadgBb1xCK
— Ethereum Foundation (@ethereumfndn) September 7, 2026
Hegotá Sets the Stage for Quantum Security Work
In a blog post, the Ethereum Foundation said around 60 researchers and engineers across nine Protocol teams contributed to a unified review of 62 proposals for Hegotá. Their assessment produced 397 grades before contested items were discussed collectively. For core developers, the central goal is quantum resistance across execution, consensus and data by December 2029.
That timeline aligns with migration targets from Google, Cloudflare and Microsoft, even though the arrival of Q-day remains uncertain. Planning assumptions lean conservative, with the Foundation stating that Ethereum should prepare for Q-day as early as 2030, while acknowledging that credible estimates place it later and that it may never occur. The December 2029 deadline will stay fixed until at least January 2027, when progress in quantum computing will be reassessed with outside experts.
Under the current roadmap, Glamsterdam is expected in December 2026, while full post-quantum readiness sits at L, five forks later. Achieving that milestone requires an average cadence of 7.2 months. A fallback path at J could deliver minimum viable post-quantum protection with a 12-month cadence, keeping Ethereum functional through Q-day with reduced guarantees that researchers are still defining.
Security Prioritized Over Additional Scope
Hegotá itself is not the quantum-resistant fork. Instead, it determines whether the subsequent quantum-security work can arrive on schedule. Two proposals lead the list: FOCIL, which targets transaction inclusion by giving validators more control over builders, and Frame Transactions, which advances account abstraction and a path away from vulnerable secp256k1 keys.
Only two of the 62 proposals earned an S grade, while 28 were declined. Limited testing and engineering capacity shape the scope, and developers show little appetite for consensus-layer additions unless they directly support quantum readiness. Vitalik Buterin’s February roadmap highlighted plans to replace vulnerable BLS signatures and introduce account abstraction through EIP-8141, reinforcing that Ethereum will spread quantum-security work across several forks rather than treat it as a single upgrade.
