Solutions Engineer at Okta. I write about identity, access management, and security. This site archives my published articles, talks, and presentations.
Auth0 gives you a lot of knobs to turn when it comes to sessions and tokens. This post maps out every option - including RFC 8693 token exchange flows for service delegation and external identity bridging - and shows how they work together for different application types.
Running Auth0 MFA demos with real SMS requires every presenter to have a personal phone enrolled. Auth0's custom-phone-provider trigger lets you route codes to a shared inbox instead, so any team member can run the demo without any per-device setup.
OpenID's Shared Signals Framework and Continuous Access Evaluation Profile went final in August 2025, but Auth0 supports neither natively. This post details a from-scratch reference implementation, and what building it revealed about the gap between a finalised spec and the tooling around it.
The previous post covered the CIBA approval flow for delegated access. This one covers what happens when the five-minute CIBA window closes before the approver responds - and why the answer reveals an important architectural distinction between the delivery mechanism and the approval itself.
A server-rendered web app is the simplest of Auth0's session patterns to reason about, right up until you try to revoke a session and find out the browser didn't get the memo. Here's how to build one properly.