Since the latest of the weekly installations of a new OS on my iPad Air I have had to enter a security code each time I boot up, or even after my iPad has had a little snooze. That's a PITB, and I am certain I never set it to do that. I may be wrong about that because I do suffer a little confusion with iPad settings, but I don't think I asked for the nuisance. It has an adverse security side effect in that anyone standing beside me can see me log in and get my security code. Seems silly to me! How can I eliminate it?