- Buterin believes indistinguishability obfuscation could eventually remove the need for trusted committees in private blockchain voting.
- Blockchain infrastructure would still be required because obfuscated programs cannot safely maintain shared state on their own.
- Despite recent cryptographic progress, the computing demands remain so extreme that the technology is still years away from practical use.
Ethereum co-founder Vitalik Buterin has outlined how a future cryptographic breakthrough could enable fully private onchain voting without relying on trusted intermediaries, although he says the technology remains far from practical deployment.
In a technical essay, Buterin examined indistinguishability obfuscation (iO), a form of cryptography designed to conceal how software works while still allowing it to produce the correct outputs when executed. He argued that combining iO with blockchain infrastructure could enable private, collusion-resistant voting with almost no trust placed in committees responsible for handling ballots or revealing results.
According to Buterin, an obfuscated program could process encrypted votes and publish only the final tally without exposing individual ballots or revealing its internal logic. That approach would remove the need for threshold committees, which currently share responsibility for decrypting election data.
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Obfuscation Cannot Work Alone
He explained that blockchains would still be essential because obfuscated software cannot prevent itself from being copied or independently maintain changing state, making it unsuitable on its own for applications involving balances or other stateful systems.
Although researchers have recently demonstrated ways to construct iO using reasonable security assumptions, Buterin said today’s implementations require “galactic” levels of computation, with some approaches taking longer than the lifetime of the universe to execute.
He described obfuscation as a long-term research direction rather than production-ready technology, comparing its current stage to early zero-knowledge proof research before years of optimisation transformed it into practical blockchain infrastructure.
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