I’ve got a passcode lock on my iPad 2 so that it cannot be accessed by individuals who weren’t given permission to play with it. However, I also use an Apple Smart Cover, and thanks to a security flaw in the iPad’s iOS software, my passcode lock is now useless, because anyone can use my Smart Cover to gain entry to my iPad.
The Passcode Lock On Your iPad 2 Is Useless If You Use a Smart Cover