Vitalik Buterin Says Obfuscation Could Make Secret On-Chain Voting Possible

Ethereum co-founder Vitalik Buterin has published a technical essay arguing that cryptography could enable secret on-chain voting without relying on trusted institutions.

Cointelegraph reported on June 29 that Buterin wrote in a blog post that combining a cryptographic technique known as indistinguishability obfuscation, or iO, with blockchain infrastructure could create a secret, collusion-resistant voting system with "minimal trust assumptions."

Current on-chain voting systems rely on a group of operators that jointly decrypt voting data, known as a threshold committee. Replacing that structure with an iO-based protected program could reduce the risk of insider interference and allow voters to take part without revealing their choices, Buterin wrote. He argued that such a system would also make decentralized governance harder to manipulate.

iO is a cryptographic technique that converts software into a protected program. It allows users to obtain the result of running the program without viewing its internal code or stored data. Buterin described it as a way to hide the code itself rather than the information being processed. In on-chain voting, that could make it possible to build an obfuscated program that processes encrypted ballots and reveals only the final tally, without exposing individual votes.

Buterin acknowledged that the technology is still far from practical use. The most conservative implementation would require what he called "astronomical" computing power, while faster approaches depend on security assumptions that have been tested less thoroughly. He characterized the idea as a long-term research direction rather than a system ready for immediate deployment.

Buterin previously discussed the connection between iO and secret voting in Ethereum's roadmap in October 2024. The new essay expands on that proposal, analyzing the underlying cryptographic structure, the required security assumptions and the technical barriers to practical adoption in greater detail. In January 2026, he also allocated 16,384 ETH from his personal holdings to support privacy-preserving technology and open infrastructure initiatives.