Answer Description
Unfortunately, the only viable recovery option listed is to attempt to brute force the user's password. However, this method should only be used as a last resort.
Wikipedia
In cryptography, a brute-force attack consists of an attacker trying many passwords or passphrases with the hope of eventually guessing correctly. The attacker systematically checks all possible passwords and passphrases until the correct one is found. Alternatively, the attacker can attempt to guess the key which is typically created from the password using a key derivation function. This is known as an exhaustive key search.
A brute-force attack is a cryptanalytic attack that can, in theory, …
Brute-force attack - Wikipedia, the free encyclopedia