World ID 4.0 explained

World ID 4.0 is a system for proving a real person is behind an online account without handing over a name or email. It was rolled out by World on April 17 as “full-stack proof of human” for apps, businesses and artificial intelligence agents. (world.org) The basic idea is a reusable “proof of human”: a credential on your phone that can show you are a unique person when a service asks. World says people can get that proof after verifying at its Orb device, which scans the iris, and then use it across dating apps, games, social platforms and other services. (world.org) World says nearly 18 million people in 160 countries have already verified at an Orb. The company says the new release adds a dedicated World ID app, now described as “soon-to-launch,” to manage credentials and use that proof across services. (world.org) Version 4.0 changes the plumbing underneath the system. World’s engineering team says it moves World ID from a single secret to a registry record with multiple authorized keys, which allows multi-device use, recovery if access is lost, and key rotation if a credential is compromised. (world.org) For developers, the upgrade also adds relying-party registration and signed proof requests, which are meant to stop attackers from impersonating an app during verification. World’s developer docs tell builders to migrate to the 4.x stack and keep the signing key on the server, not in the client app. (docs.world.org) World and outside coverage describe the new system as tiered verification rather than a single check. Financial Express reported on April 20 that the options now range from full Orb verification to Near Field Communication government ID checks and a new on-device “Selfie Check.” (financialexpress.com) The pitch is that older internet trust tools are weakening as bots, deepfakes and synthetic accounts get better. World says one-time-use nullifiers prevent separate interactions from being linked together, so a service can verify “human” without learning a person’s identity. (world.org) Sam Altman is a co-founder of World, but Tools for Humanity, the company building the technology, operates independently from OpenAI. Financial Express said the project began as Worldcoin in 2019 with Altman, Alex Blania and Max Novendstern, and has since been repositioned around digital identity and human verification. (financialexpress.com) The project has also drawn scrutiny over biometric data and privacy. World says Orb verification encrypts the data, sends it to the user’s phone and permanently deletes it from the device, while critics and regulators have previously questioned how biometric systems collect, store and govern sensitive information. (world.org, financialexpress.com) What World ID 4.0 tries to sell is not a passport or a social profile, but a yes-or-no answer to a narrower question: is there one real human here? World’s bet is that this kind of check will become a standard layer of the internet as artificial intelligence fills more of it with convincing fakes. (world.org, world.org)