Add configuration options for encryption

**Problem**
When working with middleware, 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 reviewing the middleware and configuration handling, then inspect how current error messages are produced. The issue does not name files or tests; clarify the encryption options and specific error cases before work can be considered complete.

Written by the indexing model from the issue text.