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Sometimes you can unlock people's phones by holding them up to the light and seeing where the grease marks are, if they use the dot pattern unlock or a small pi
by jimmaswell 10y ago
Sometimes you can unlock people's phones by holding them up to the light and seeing where the grease marks are, if they use the dot pattern unlock or a small pin. Got a few people with this in high school.
- nom 10y agoI was about to mention this in my post but wanted to keep it short :D. The smudge marks are probably as good of an indicator as the heat signature, considering that they don't degrade with time. It also works better with the pattern-type unlock screen on android (but not so well with the pin-type). That reminds me, you could build a system that records and highlights the smudges (by using a circular arrangement of LEDs and a fixed camera, or by taking pictures from multiple angles under a single light source). It should make a good weekend project, maybe I'll try it :)