One solution is to configure a finger which, when scanned, erases the phone. Or maybe the finger triggers a 'enter unlock pin' dialog - with a secret code that

One solution is to configure a finger which, when scanned, erases the phone. Or maybe the finger triggers a 'enter unlock pin' dialog - with a secret code that erases all data.. Not sure if you can do that from an app - probably no - so Apple should step in here...