Passwords expire every 30 days for every system except 1 that I use.
Passwords can not have month or year in them
must have at least 1 number in the middle, but begin and end with a letter.
must be 8 or more characters except one system which must be > 20.
can not share any letter in the same space as any of your previous 3 passwords except 1 system.
Needless to say this bothers the hell out of everyone. of the 200 or so people in my building, at least 20 people callt he helpdesk for a password reset on a given day.
Not me though. I got so fricking pissed off that I wrote scripts for 8 of the 9 systems that create randomly generates 5 passwords and goes though them all changing it each time. Then sets the password back to the original one I always use. It takes me about 3 or 4 minutes the end of every month. The last system doesn't have any limitations on resuse, so I set it to the same password.
At least I have mine memorized, while most of the other people have their usernames and passwords on post-it's on their monitors. (great security there) When are the people who set up this crap goign to realize that they are not helping anything? Security is worse then if the passwords changed once a year.
<edit>
interesting fact: Before I started, the month-year thing and number in the middle wasn't in the list. Apprently, everyone was using the month name and putting the year at the end. The admins ran a query (after one user was found to be using another user's password to do things they shouldn't) on a bunch of different systems and found that almost 40% of the password entries all had one of 2 hashes in a few mainframe systems So odds were, 4 out of 10 people had their password as 'January06' or 'January2006'