No other app should need to scan your DiceKey directly. If it needs a cryptographic keys or a password, the DiceKeys app can generate one exclusively for that app to use.
If you let other apps scan your DiceKey, it can create any key that can be generated from your DiceKey, including ones you might not want it to have access to. Even if the app is designed by someone you trust, it may be more complex and have hidden vulnerabilities.Before scanning your DiceKey, always launch the app from your device’s application list.
Otherwise, another app might mimic the DiceKeys app to trick you into allowing it to scan your DiceKey.
DiceKeys can form an astronomical number of combinations.
More than the number of atoms in billions of galaxies.