IKP: Proof of Personhood

March 2, 2026

13:50 - 15:20

Shibuya Parco DG Bldg. - Room B

IKP

Session Overview

As AI agents become increasingly capable of impersonating human behaviour, proving that a participant is a unique real person — without sacrificing privacy — becomes essential for governance, voting, and trust systems. This session advances the Proof of Personhood working group item through case study presentations from World ID, the First Person Project, and Human.Tech, alongside a new theoretical contribution: the three-graph, one-trajectory model for personhood verification. Participants will evaluate the trade-offs between scalability, privacy, and Sybil resistance across biometric, social graph, and credential-based mechanisms.

Agenda

1. Proof of Personhood: defining requirements and the agent duality challenge

2. Case study: World ID — biometric-based personhood at scale

3. Case study: First Person Project — decentralised personhood credentials and trust graphs

4. Case study: Human.Tech — human-centric verification perspectives

5. Presentation: Three graphs, one trajectory — a unified theory of personhood verification (Mitchell Travers)

6. Privacy considerations and risks across approaches

7. Integration with self-sovereign identity frameworks

8. Agent Hack connection: trust tier system and bilateral attestations

9. Working group item refinement and next steps

Session Chair & Main Contributor

Session Chair

Mitchell Travers, Nat Sakimura

Venue Details

Location: Shibuya Parco DG Bldg. - Room B

Address: 15-1 Udagawa-cho, Shibuya-ku, Tokyo 150-0042, Japan

Shibuya Parco DG Bldg., 18th Floor

Working Group

IKP

Identity, Key Management & Privacy

Focuses on identity management, key management strategies, and privacy-preserving technologies

Chairs:

Mitchell Travers
Nat Sakimura

Contact Info

bgin_admin@bg2x.org