World has opened ProveKit, the zero-knowledge tool within World ID, to developers, allowing phones to verify a user’s age without exposing the underlying ID. The release expands privacy-preserving identity checks by letting apps confirm age eligibility without directly viewing sensitive personal documents. The launch comes as a dark web service is reportedly offering more than 153 million leaked driver’s licenses for sale. The timing underscores rising demand for tools that reduce the need to share raw identity data during online verification.