Handle edge cases in encryption

**Description**
Currently controllers lacks proper monitoring support.

**Proposed solution**
Add configurable monitoring with sensible defaults.

**Priority**: Low/Medium

First reconcile the title's encryption reference with the body’s request for controller monitoring. After the scope is confirmed, inspect the controller entry points and any existing configuration or monitoring hooks; done should mean configurable monitoring works with documented sensible defaults and covers the agreed edge cases.

Written by the indexing model from the issue text.