Opera Master Password Recovery Screenshots:
setting Opera Master Password recovery options

Currently there are 8 decryption methods available:

1. Preliminary attack is a simple set of mini sub-attacks.
2. Artificial Intelligence attack. Scans your current system for the lost password.
3. Dictionary attack. Try every word from a dictionary until the password is found. This attack is the most effective against simple passwords.
4. Brute-force attack guesses the password by trying all probable password variants from a given character set.
5. Mask attack is very helpful if there's any information about the password.
6. Base-word attack is useful if a part or source word of the password is known.
7. Combined dictionary attack - to guess complex passwords.
8. Phrase attack uses to search complex password by looking through a dictionary with frequently used phrases.

Once selected a recovery type, you will be prompted for different options on the next Wizard page.