Windows CardSpace - setting InfoCard PIN recovery options

Currently there are 8 decryption methods available:

1. Preliminary attack usually runs before each attack.
2. Artificial Intelligence attack. Search 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.
4. Brute-force attack guesses the password trying all possible password variants by given character set.
5. Mask attack is very helpful if there's any information about the password.
6. Base-word attack. Useful if a part (or source word) of the password is known.
7. Combined dictionary attack uses to guess complex/compound passwords.
8. Phrase attack uses primary to search complex password by looking through a dictionary with frequently used phrases.

Take a look at general recommendations on recovering passwords from hashes.