Handle edge cases in filtering

**Description**
Currently handlers lacks proper encryption support.

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

**Priority**: Low/Medium

The issue mentions handlers but does not identify a file, test, or configuration entry point. Start by locating the handler implementation and existing configuration or filtering logic, then check how encryption is currently handled. Done should mean configurable encryption with sensible defaults and coverage for the stated filtering edge cases.

Written by the indexing model from the issue text.