---
id: aai
title: AAI
hoverText: Authentication, Authorization, and Identity — the infrastructure for managing user access and permissions.
---

AAI (Authentication, Authorization, and Identity) is the infrastructure layer responsible for managing user authentication (verifying identity), authorization (controlling access), and identity management across the platform. In Themelio, this is implemented through Pharos AAI using RCIAM, Keycloak, and OIDC.