TheBlock
World, the human identity startup co-founded by OpenAI chief Sam Altman, has open-sourced ProveKit, a zero-knowledge identity proving toolkit the company spent roughly two years building. The release puts battle-tested ZK infrastructure in the hands of any developer building age, nationality or document-ownership checks, with proofs generated locally on a standard phone in seconds. World Foundation said the move is meant to make privacy-preserving authentication "neutral and permissionless" rather than a closed product wrapped around the firm's biometric World ID system.
Why it matters
The release lands in the middle of a credibility crisis for online identity verification. Earlier this week, reporting from veteran cybersecurity journalist Brian Krebs revealed that dark-web service Nexus is selling scans of more than 153 million U.S. and Canadian driver's licenses, data believed to have been siphoned from ID verification vendor IDScan.net. World's head of blockchain Remco Bloemen framed the moment bluntly on X: "Identity documents should only be authenticated using zero-knowledge proofs." Open-sourcing ProveKit turns that stance into something competitors can fork rather than just admire.
For World, the strategic logic is defensive as much as it is idealistic. The firm's iris-scan-based identity project has drawn regulatory scrutiny across Spain, Kenya, Brazil, Indonesia, South Korea, Hong Kong and the Philippines. Giving the underlying proving stack to the open-source community stakes out a position as the privacy layer of the credential ecosystem, separate from the more controversial biometric capture side of the business.
Market impact
ProveKit v1 runs on standard consumer hardware, hits 128-bit post-quantum security without a trusted setup, and supports Noir, the Rust-inspired ZK language developed by Aztec. World said proofs complete in seconds on a typical phone and in under 30 seconds on low-end test devices, with the verifier receiving only confirmation of the specific claim and not the underlying document data.
Frequently asked questions
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What is ProveKit?
ProveKit is an open-source zero-knowledge identity proving toolkit developed by World, formerly known as Worldcoin. It lets users generate cryptographic proofs locally on a phone or browser that verify a claim, like age or document ownership, without revealing the underlying personal data.
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Why is World open-sourcing ProveKit now?
World Foundation said it wants privacy-preserving authentication to be "neutral and permissionless." The release also lands the same week dark-web service Nexus was reported to be selling 153 million driver's license scans, sharpening the case for zero-knowledge credential checks.
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What does ProveKit do that other ZK tools don't?
ProveKit generates proofs locally on the user's device rather than delegating them to an external server, meaning personal data never leaves the phone. It targets 128-bit post-quantum security, requires no trusted setup, and supports Noir, the Rust-inspired ZK language developed by Aztec.
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How long does a ProveKit proof take?
World said ProveKit completes proofs in seconds on a typical phone and in under 30 seconds on a low-end test device. The verifier only learns whether the specific claim is true; the underlying document data never leaves the user's device.
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What's next for ProveKit?
A v2 release is in development targeting Groth16 for on-chain verification across World Chain, Ethereum, Base and Solana. The goal is smaller proofs, lower memory usage and faster verification while staying compatible with the Semaphore protocol World previously used.
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