Identity & Access Control

Responsibilities

• Authenticate users/services and enforce authorization decisions.
• Manage sessions, tokens, and tenant boundaries.
• Provide policy hooks (RBAC/ABAC) consistently across surfaces.

Key interfaces

• Authn methods (passwordless, OAuth, passkeys) and session contracts.
• Authorization policy evaluation (roles, attributes, scopes).
• Tenant isolation identifiers and enforcement points.

Operational signals

These are the measurements that tell you whether this layer is healthy in production.

• Login success/failure rates and auth latency.
• Token/session refresh errors and clock skew issues.
• Suspicious activity signals (impossible travel, abuse patterns).

Failure modes

• Privilege escalation due to missing checks.
• Session fixation or replay vulnerabilities.
• Inconsistent tenant scoping across services.

Production readiness checklist

• Centralize policy checks; add audit logs for sensitive actions.
• Use short-lived tokens with refresh; rotate secrets/keys.
• Validate tenant scoping in every data access path.