Proof of Personhood Protocols

Proof of Personhood (PoP) protocols issue credentials that verify a holder is a unique living human without revealing their identity. Using mechanisms like Turing tests, social graph analysis, or biometric hashing (e.g., iris scans), PoP provides a defense against Sybil attacks and bot swarms in digital governance, voting systems, and fair airdrops, ensuring 'one person, one vote'.