: When sharing, the feature should allow re-encrypting the document with a new password, ensuring the original "PASSWORD" file remains secure.

To help you build this, are you developing a (e.g., Windows/macOS) or a mobile app (iOS/Android)?

If you tell me your target platform, I can give you specific technical solutions for managing file security.

: Since the file is marked with a compression icon (\🗜), a feature to automatically extract contents to a secure, encrypted container within the app [2].

: A dedicated importer that detects if a PDF is encrypted upon selection and immediately prompts for the password to verify access [1, 2].

: If the document is stored in the cloud, ensure it remains in its locked/zipped state during transit and storage [2].