Ethereum co-founder Vitalik Buterin highlighted four potential pitfalls of Worldcoin's iris-scanning identity verification solution, co-founded by OpenAI CEO Sam Altman, which launched its WLD token earlier today.

Buterin pointed to privacy, accessibility, centralization and security as the major risks associated with Worldcoin’s Proof-of-Personhood (PoP) construction and proposed an alternative solution to mitigate against them in a blog post on Monday.

PoP is a system designed to authenticate the uniqueness of a user in a decentralized way without relying on a central authority or revealing personal information. Use cases include avoiding Sybil attacks by preventing multiple account creation, event tickets, airdrops and DAO voting.

Worldcoin users install an app and have their irises …