Ethereum Co-founder Vitalik Buterin: Public Key Cryptography May Still Need One or Two Rounds of Parameter Upgrades

Ethereum co-founder Vitalik Buterin stated in an interview with Balaji Srinivasan at the Network State Conference 2026 on October 9 that public key cryptography will continue to evolve, but may require one or two more rounds of updates in the future to further expand relevant parameters.

Vitalik compared this process to experiencing a few more "Y2K" style upgrade milestones. He also noted that network security faces similar situations, and while there are still many obstacles to overcome, he remains optimistic about the final outcome.

In related discussions, Vitalik previously posted on October 7, indicating that AI-accelerated mathematical advancements could pressure lattice-based cryptography, including schemes like ML-DSA and Falcon, and suggested expanding lattice key sizes by about 10 times as a long-term protective hedge. He emphasized that hash-based schemes are preferable to lattice-based ones when feasible and recommended using new addresses for ECDSA and prioritizing off-chain confirmations for multi-signatures to avoid hasty migrations that could lead to fund losses.

Vitalik expanded the current risks in cryptography from quantum computing to AI-driven mathematical breakthroughs, pointing out that structured trapdoor objects (like lattice-based or group theory) may have weaknesses discovered by AI. He also noted that public key encryption cannot solely rely on hashes, making parameter expansion a realistic path. In Ethereum's roadmap, Hegota is expected to be the last "normal" fork in 2027, after which it will shift towards recursive STARK, automated formal verification, and quantum-safe design.

The field of network security also faces similar iterative demands. Vitalik stated that there are obstacles in the process, but he remains optimistic about the final outcome. As the foundation of blockchain and secure communication, upgrades to public key cryptography parameters will impact the security boundaries of transaction signatures, encrypted communications, and VPNs.

The demand for cryptographic parameter upgrades drives resource allocation from existing schemes to larger key sizes or hash-based alternatives. The event is driven by public interviews and posts. Protocol layer and wallet developers need to invest in verification and migration costs, while users face compatibility and migration risks due to parameter changes; adjustments to long-term security assumptions put pressure on systems relying on lattice-based schemes.

Source: Public Information

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Vitalik Buterin has long led the evolution of Ethereum's cryptography and protocols, including promoting the planning from ECDSA to post-quantum schemes, and introducing recursive STARK and formal verification in the Lean roadmap. In his interview at the Network State Conference in October 2026 and subsequent posts, he listed AI-accelerated mathematical breakthroughs as a risk source alongside quantum computing, and explicitly suggested expanding parameters for lattice-based schemes (ML-DSA, Falcon).

Resources and research focus are shifting from assuming relative security of lattice and hash to conservative parameterization of structured cryptography and prioritizing hash-based alternatives. Vitalik recommends expanding lattice key sizes by about 10 times and prioritizing hash-based signatures (like WOTS, SPHINCS) in feasible scenarios; he also advises users to avoid hasty wallet migrations and to use off-chain confirmations for multi-signatures to reduce public key exposure windows. Future Ethereum forks will incorporate these considerations into designs for quantum safety and automated verification.

Similar to the early internet's transition from RSA to larger keys and elliptic curves, or Y2K-style system parameter adjustments, cryptography is shifting from static security assumptions to proactive parameter upgrades in response to dual pressures from AI and quantum computing. Ethereum is currently transitioning to a "cryptographic world computer" architecture after the 2027 Hegota, with the parameter boundaries of public key cryptography becoming a common constraint at both the protocol and application layers.

This essentially represents a technological substitution. Public key cryptography relies on trapdoor problems with mathematical structures, and AI-accelerated mathematical discoveries may shorten attack paths, rendering existing security boundaries ineffective under current parameters. This change occurs because traditional cryptanalysis cycles are compressed by AI, making structured schemes more susceptible to algorithmic improvements than pure hashes, forcing protocols and applications to maintain long-term security assumptions by expanding parameters or switching to hash-based alternatives.

ABAB News · Cognitive Laws

The next round of cryptographic parameter upgrades is determined by the speed of AI mathematics.
The security boundaries of structured schemes are recalculated ahead of hash-based ones.
Y2K-style milestones reappear in the iterations of public key cryptography.