proof-of-personhood
A mechanism to verify that a blockchain address is controlled by a unique, real human being, and not a bot or multiple accounts from the same person.
Proof of Personhood aims to solve the 'Sybil attack' problem in decentralized systems. It ensures 'one person, one vote' by using biometric scans (like iris recognition) or social networks of trust (vouching). This is essential for fair airdrops and democratic governance in DAOs.
graph LR
Center["proof-of-personhood"]:::main
Pre_blockchain["blockchain"]:::pre --> Center
click Pre_blockchain "/terms/blockchain"
Pre_sybil_attack["sybil-attack"]:::pre --> Center
click Pre_sybil_attack "/terms/sybil-attack"
Rel_governance["governance"]:::related -.-> Center
click Rel_governance "/terms/governance"
Rel_nft["nft"]:::related -.-> Center
click Rel_nft "/terms/nft"
Rel_on_chain_identity_management["on-chain-identity-management"]:::related -.-> Center
click Rel_on_chain_identity_management "/terms/on-chain-identity-management"
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🧠 Knowledge Check
🧒 Explain Like I'm 5
It's like getting a stamp on your hand at a carnival so the staff knows you're a real person and you can't go back and get 10 free ice creams by pretending to be 10 different people.
🤓 Expert Deep Dive
Prominent examples include Worldcoin (Orbs for iris scanning) and Proof of Humanity (video verification and vouching). It creates a unique 'human-ness' score that protocols can use to filter out bot activity.