Re: Too Many bad Movies
passwords are more likely to be guessed the more they are used; but it is offset very easily by making it longer
the original advice of the 30-day lifetime of a password assumed a fairly simple password (essentially a single word selected uniformly at random from greatly reduced English dictionary), double the password (use two words) and the 30 days suddenly become 80 years at the same level of security
oh, and another thing often forgot: the original advice included mandatory rate limiting on incorrect logon attempts