When I went to do a restore of my locked up iPhone (Thank you iOS 4.3.5 update), I plugged it in and it asked for a password before it could do the restore. Password?? I don’t remember putting any password on my backup?!? Doing a quick google turns up a bunch of people looking for help, with lots of other people telling them they shouldn’t steal
After trying a number of different passwords, I finally made the connections: Its the password of your computer login Id you are logged in as. Not any security PIN, not your AppleID password.
Hope that helps someone!