Extracting PIN Codes from Keypads with Thermal Imaging Fingerprints

Well this is kind of shocking. Of course your physical fingerprint will remain on most things you touch, but on keypads your finger depress of the button could leave a heat signature for “over a minute” and allow someone using thermal imaging to see what numbers you pressed!


A few days ago I was able to get my fingers on, and under, an infrared camera. I had already heard before that the thermal signature of fingerprints is visible for quite some time — but what surprised me was that we were still able to see them for over a minute…


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