I want to compose my own rulesets; where can I find documentation?
Documentation on the rulesets is a bit scanty, but this file should be of help. • I want to use Crack to check users’ passwords when they are changing them; can I do this? Yes, however you ought to be looking at my CrackLib software which does this, and not Crack itself. • Crack 4.x used to have this really neat feature where it would store passwords that it had not managed to guess, and it would not bother to attack them again next time. Why doesn’t 5.x do this? I want this functionality back! I removed this functionality because many Crack users were not bothering to clear out the history of so-called “unguessable” passwords every few months; the point was that a password that was unguessable one month, might become guessable the next month, when other updates/additions might have been added to the password map, providing more guessing material for Crack. People who want to reduce Crack runtime by only running it against new additions and changes to the password file, are encouraged
