Vitalik Buterin says obfuscation could unlock private onchain crypto voting

Vitalik Buterin said indistinguishability obfuscation could eventually support private, collusion-resistant onchain voting without trusted committees, though the technology remains impractical.

Ethereum co-founder Vitalik Buterin published a technical essay outlining how cryptography could one day enable people to vote privately onchain without relying on a trusted group to manage ballots or reveal the result. 

In a blog post on Monday, Buterin said a cryptographic approach called indistinguishability obfuscation (iO), combined with blockchain infrastructure, could support private and collusion-resistant voting with “almost no trust assumption.” The approach would replace threshold committees, which jointly decrypt voting data, with protected programs designed only to reveal the outcome. 

Private onchain voting remains dependent on groups of operators safeguarding information and behaving honestly. Removing that dependency could make decentralized governance harder to manipulate, reduce the risk of insider interference and allow voters to participate without exposing how they voted, according to Buterin. 

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