I used to be able to set a screen saver password in the original Nook (i.e. password to unlock the device when it wakes up after going to sleep or powered off). But this option is not avaiable in the Simple Touch (2nd edition). I checked with customer service. They first asked me to go to the "Security" option but I told them there is no "Security" under Settings. They then asked me to check Screen option under Settings but when I told them the only options displayed are Authors and Nature, they finaly said the password option is not available. BTW, I am not referring to Wifi or purchase passwords both of which I was able to set.