Bismillah writes: A British infosec company has discovered that cheap thermal imaging attachments for smartphones can be used to work out which keys users press on — for instance — ATM PIN pads. The thermal imprint last for a minute or longer. That’s especially worrying if your PIN takes the form of letters, as do many users’ phone-unlock patterns. Read more of this story at Slashdot.

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Cheap Thermal Imagers Can Steal User PINs