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[Q] Double-layer security?

3rd January 2014, 04:01 PM |#1  
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Not sure if this belongs here, but I don't know a better place for a general question... I just rewatched an episode of the adapted Sherlock TV series and there was a character who had a phone (which contained a lot of personal, but also international secrets). The phone needed a four-digit code to unlock, but there was a catch: if you input the right code, it unlocks like usually, but if you put in a special code (which you can say is the real one), the device is wiped. How cool is that!
Basically, my question is: can such an app exist or be developed?
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