If the forensic examiner is allowed to &quot;guess&quot; what&#x27;s on the drive, why can&#x27;t the owner of the drive &quot;forget&quot; the passphrase?<p>I have an encrypted filesystem from years ago that I&#x27;ve forgotten the password to, it has some vacation pictures on it that I&#x27;d like to retrieve, and every once in a while I try to guess the passphrase but so far I&#x27;ve been unable to.