No database is perfect. Xreveal’s current shortcomings:

While not "encryption," these are the foundation of the database:

Offline Access: Once downloaded, Xreveal can decrypt discs without an internet connection. How to Find and Install the Top Key Databases

Xreveal exposes its key database via a (right-click tray icon → Key Database Viewer). Here you can:

Automatically maintains a "My Discs" ( keydb.db ) database of used keys.