Thermal signatures on rubber or plastic

—Thermal Signatures on ATM Buttons—


An interesting piece of capturing numbers pushed with them leaving a thermal signature, and interesting advice on what to do.

If they are metal buttons then there is less to worry about, but if they are rubber or plastic they retain the thermal signature longer.

The theory of this is written in a PDF File here

And if you want a FLIR one go here

This morning I came across this, I knew it was possible, but I didn’t know how to start to reveal it. This guy likes to explain it, and does a good job.


When we interact with the world, we leave invisible trails that we can’t imagine.

The thermal signatures are only the simple of those trails. There are many more that you can’t even imagine.

I can’t imagine them.