Kim Hamilton Duffy
Digital identity, privacy, and human agency
I’ve built systems for issuing and verifying digital credentials. Now I’m working on how people can delegate tasks to AI agents and stay in control of what those agents do.
Selected Work
Personhood Credentials
How people could prove they are human online while protecting their privacy.
Research paper · 2024
Read the paper →Chains of Trust
A framework for verifying the provenance of digital content in the age of AI.
Oxford Intersections · 2025
Read the chapter →Is Server Retrieval Actually Optional?
An investigation into how mobile driver's licenses can enable tracking.
Technical analysis · 2025
Read the analysis →Blockcerts
Open-source tools for issuing and verifying digital credentials, co-created with the MIT Media Lab.
Open-source project
Explore Blockcerts →