IKP: Privacy Enhanced Authentication, ZKP & Proof of Personhood

Session Overview

Agenda

• Why now: agentic AI raises the cost of not knowing a counterparty is human — picking up from the Block 14 reports (Privacy Enhanced Authentication and Key Management; Proof of Personhood) and the IKP open meetings since
• Privacy-enhanced authentication at a high level: prove the claim, not the identity — minimal disclosure, unlinkability, and what each proof actually proves, where the biometric lives, and what revocation means for a credential bound to something that cannot be rotated
• Proof-of-personhood taxonomy, with World as a main discussant: the distinctions it has to keep — proof of a unique human versus proof of a specific human, humanity versus uniqueness, linkability scope, how assurance strength is stated rather than asserted, continuity, and agent authority
• Verifiable trust agents: an agent acting for a person carrying personhood assurance with delegated scope — does the principal need to be identified, or only assured as human? Personhood credentials as the node, relationship credentials as the edges
• Zero-knowledge proofs where they earn their place: predicates that carry assurance strength without revealing the issuer, client-side proving on the phones people already own, and post-quantum readiness of the credential stack
• Contributions (20 min): short presentations from contributors to the session
• Discussion: gaps nobody owns yet — coercion and credential rental, a threat model per assurance category, governance and appeal when a human is falsely denied
• Next steps: room comments into the IKP proof-of-personhood paper, a release for public comment, and the ISO TC 307 Technical Report path

Session Chair & Speakers

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