Handle edge cases in encryption

**Problem**
When working with data, the error messages could be more descriptive.

**Suggestion**
Improve error handling and add detailed error messages.

**Context**
This would help with debugging and maintenance.

Start by locating the encryption-related paths and their current error handling in the repository. Review how failures are reported, then define and verify more descriptive messages for the relevant edge cases; the issue provides no file or test names.

Written by the indexing model from the issue text.