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This story was originally published on HackerNoon at: https://hackernoon.com/world-open-sources-provekit-a-post-quantum-proving-toolkit-that-runs-on-a-phone.
World open-sources ProveKit, a post-quantum zero-knowledge toolkit that proves age or nationality on a phone in seconds without the document ever leaving it.
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World open-sourced ProveKit on 2 September 2026, a production-ready zero-knowledge proving toolkit that generates cryptographic proofs directly on a person's phone or browser rather than on a remote server. It lets someone prove claims such as age, nationality or ownership of a valid identity document while the verifier receives confirmation of that single claim and nothing else. ProveKit completes proofs in seconds on a typical phone and in under 30 seconds on a low-end test device, operates with limited memory and supports offline use. It targets 128-bit post-quantum security, requires no trusted setup, uses the WHIR hash-based commitment scheme and has been independently audited by Least Authority. The toolkit compiles circuits written in Noir into R1CS constraints and generates WHIR proofs through a Spartan-based protocol, with bindings for Swift, Kotlin, JavaScript and Rust. It has run inside World ID since April and ships under an MIT licence. World ID Credentials store data from NFC chip-enabled identity documents locally on the device, inaccessible to the World Foundation, Tools for Humanity or any third party. ProveKit v2 is in development, targeting smaller proofs, faster proving, lower memory use and more efficient on-chain verification.