Summary Vitalik Buterin has urged Ethereum zkEVM developers to prioritize security, declaring the competition for faster zero knowledge proofs effectively complete. Buterin outlined three sec
Ethereum co-founder Vitalik Buterin has urged zkEVM developers to prioritize security following progress from ZKsync’s Airbender team. According to Buterin, progress by ZKsync’s Airbender team has shifted attention from proving speed to three security priorities aimed at strengthening transaction verification and keeping computational costs manageable for smaller Ethereum operators.
Buterin’s priority requires mathematical confirmation that zkEVM proofs accurately reflect Ethereum’s execution rules. This requirement would help expose differences between the network’s official specifications and the calculations used by proving systems.
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The second priority calls for a strict upper limit on proving costs relative to the gas consumed within each Ethereum block. Such limits would help prevent unusually demanding blocks from imposing disproportionate expenses on proof-generating operators.
Without predictable computing requirements, smaller participants could face greater barriers, concentrating infrastructure among larger organizations. The third priority concerns the cryptographic security of the proof systems themselves, including their underlying mathematical assumptions.
Big congratulations to the @zksync airbender team for this milestone.
At this point, I consider the battle for speed to be definitively won, and the top priority for zkEVMs should shift fully to security.
To me that means formally verifying
(i) equivalence of the…
— vitalik.eth (@VitalikButerin) October 15, 2026
Together, these safeguards address whether proofs represent valid Ethereum activity, remain affordable to generate, and withstand potential security weaknesses.
Ethereum’s broader roadmap explores using zero-knowledge technology to reduce verification workloads without repeating every calculation. The approach depends on trustworthy proofs, making formal verification essential despite faster processing.
Meanwhile, Ethereum (ETH) is trading near $2,365, representing a decline of approximately 15% from its late September high of $2,800. The cryptocurrency faces immediate support at $2,360 and $2,305, while resistance levels at $2,490 and $2,550 remain important barriers to a potential price recovery.
The relative strength index hovered near 38, reflecting weak momentum without establishing whether the cryptocurrency would recover or decline further. Buterin’s recommendations concern Ethereum’s technical infrastructure rather than immediate changes to transaction fees, staking rewards, or token supply.
Developers’ progress on formal verification will determine how confidently zero-knowledge proofs can support Ethereum’s expanding verification requirements across the network while protecting participants from avoidable technical risks.
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