> For the complete documentation index, see [llms.txt](https://worlddao.gitbook.io/worlddao-white-paper/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://worlddao.gitbook.io/worlddao-white-paper/proof-of-personhood-pop.md).

# Proof of Personhood (PoP)

Different applications have different requirements for PoP. For high-stakes use cases such as global UBI, the democratic governance of AI and the Worldcoin project, a highly secure and inclusive PoP mechanism to prevent multiple registrations is needed. Therefore, the Worldcoin developer [community](https://whitepaper.worldcoin.org/other-resources#community) with the Worldcoin Foundation is laying the foundations for a high-assurance PoP mechanism with World ID. World IDs are issued to every unique human through biometric verification devices, with the first such device being the [Orb](https://whitepaper.worldcoin.org/#the-orb). The following sections walk through the fundamental building blocks of PoP and how those are implemented in the context of World ID.


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