# JAAS

> JAAS is an enterprise layer on top of Juju that provides centralized controller management, OIDC authentication, and ReBAC authorization.


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## Pages in this subsection

- [Architecture](https://documentation.ubuntu.com/jaas/latest/explanation/jaas-architecture.md): Understand JAAS architecture with JIMM, ReBAC authorization, OpenFGA, PostgreSQL database, and Vault secure storage components.

## Optional

- [Top-level llms.txt](https://documentation.ubuntu.com/jaas/latest/llms.txt): Complete documentation index.