Buterin proposes iO for private blockchain voting

Ethereum co-founder Vitalik Buterin has proposed a long-term cryptographic solution to enable truly private and trust-minimized voting on blockchains. In a technical essay published on Monday, June 29, 2026, Buterin argued that a technique called indistinguishability obfuscation, combined with blockchain infrastructure, could eventually allow for secure, private, and collusion-resistant voting systems that require almost no trusted intermediaries.

The core idea is that indistinguishability obfuscation (iO) can encrypt a computer program so that it can be executed and produce correct outputs while its internal logic remains completely hidden. For on-chain voting, this means an obfuscated program could process encrypted ballots and reveal only the final tally, without exposing any individual votes. This would eliminate the need for a threshold committee, a group of operators who currently must collectively hold and use decryption keys to reveal a voting result, creating a potential point of failure or collusion.

Buterin described obfuscation as a powerful cryptographic primitive that could act as a "trustless trusted third party." He explained that blockchains are a necessary...