# Phil Windley's Technometria

> Technometria is Phil Windley's blog, published since 2002. It covers digital identity, authorization, self-sovereign identity and verifiable credentials, AI agents, picos (an actor-model programming system), and the people-centric Internet of Things. All content is licensed CC BY-SA 4.0, and AI agents, crawlers, and other automated readers are welcome.

Phil Windley is Executive Director of the IIW Foundation and co-founder of the Internet Identity Workshop. He was founding chair of the Sovrin Foundation, CIO of the State of Utah, and founder and CTO of Kynetx. His books include Authorization in Action (Manning, 2026), Learning Digital Identity (O'Reilly, 2023), The Live Web (2011), and Digital Identity (O'Reilly, 2005).

Every post lives at https://www.windley.com/archives/YYYY/MM/<slug>.shtml and is plain, static HTML. Each post page carries the title, author, publication date, tags, and a summary.

## Feeds and indexes

- [RSS feed](https://www.windley.com/rss.xml): The most recent posts, with full text
- [Sitemap](https://www.windley.com/sitemap.xml): Every post and page on the site, with dates
- [Home page](https://www.windley.com/): Latest posts

## Topics

- [Identity](https://www.windley.com/tags/identity.shtml): Posts about digital identity
- [Authorization](https://www.windley.com/tags/authorization.shtml): Policy-based access control, Cedar, and authorization architecture
- [Agentic AI](https://www.windley.com/tags/agentic+ai.shtml): Authorization, delegation, and trust for AI agents
- [Self-sovereign identity](https://www.windley.com/tags/ssi.shtml): Decentralized identity architecture
- [Verifiable credentials](https://www.windley.com/tags/verifiable+credentials.shtml): Credential exchange and trust frameworks
- [Picos](https://www.windley.com/tags/picos.shtml): Persistent compute objects and actor-model programming
- [Manifold](https://www.windley.com/tags/manifold.shtml): Pico meshes for personal things and sensor networks
- [Internet Identity Workshop](https://www.windley.com/tags/iiw.shtml): Reports from IIW

## Key posts

- [Authentication Is Largely Solved. Authorization Isn't.](https://www.windley.com/archives/2026/09/authentication_is_largely_solved_authorization_isnt.shtml): Why authorization is now the problem that matters, and the argument behind Authorization in Action
- [Why Authorization Is the Hard Problem in Agentic AI](https://www.windley.com/archives/2026/02/why_authorization_is_the_hard_problem_in_agentic_ai.shtml): Authorization requirements for AI agents
- [The Most Inventive Thing I've Done](https://www.windley.com/archives/2022/07/the_most_inventive_thing_ive_done.shtml): An introduction to picos

## Collections

- [Self-Sovereign Identity references](https://www.windley.com/ssi/index.shtml): Curated reading on SSI
- [The Live Web series](https://www.windley.com/liveweb/index.shtml): White papers on personal clouds and the Live Web
- [Essays](https://www.windley.com/essays/index.shtml): Longer essays from 2003 to 2007

## About

- [Phil Windley](https://phil.windley.org): Biography and background
- [Why Technometria?](https://www.windley.com/essays/2005/why_technometria.shtml): What the blog is about
- [Contact](https://www.windley.com/contact.shtml): Contact form

## Optional

- [Authorization in Action](https://www.manning.com/books/authorization-in-action): Phil's book on authorization (Manning)
- [Learning Digital Identity](https://www.oreilly.com/library/view/learning-digital-identity/9781098117689/): Phil's book on digital identity (O'Reilly)