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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