What least-privilege evidence your authz model can actually produce

SOC 2-style access reviews rarely stop at "was this allowed?"

Reviewers want to know why the person (or agent) had that entitlement, whether it was appropriate, and how you prove it.

That answer depends on the authorization model:

• RBAC → evidence is mostly a role assignment. Great for "who has admin?" Weak when the role hides a grab-bag of permissions.
• ABAC → evidence is the attribute condition that matched (department, region, ownership, risk). Strong on context; needs attribute history in the decision log.
• ReBAC → evidence is the relationship path to a specific object. Strong for "why this document?"; needs graph summaries for broad reviews.
• Hybrid → often the production answer, but only if decisions stay explainable end to end.

Least privilege is model + enforcement + evidence. If reviewers cannot trace a decision back to a role, condition, or relationship, the review becomes a checkbox exercise.

We wrote up the compliance bridge here (I'm with Permit.io):

https://www.permit.io/blog/models-to-least-privilege-evidence?utm_source=devto&utm_medium=social&utm_campaign=models-to-least-privilege-evidence&utm_content=authbyexample