The lie machine

With security becoming an increasingly important issue, particularly in airports, researchers are looking into low-cost ways of remotely and rapidly monitoring people answering routine questions at check-in desks, for example. One idea is to scan people’s faces with a high-definition thermal camera that detects tiny changes in the heat of the capillaries under a person’s skin. A computer rapidly analyses any changes, picking up tell-tale signs that someone is fibbing. The US Department of Defense is seeking ideas for the development of technology that can tell from a distance if someone is exhibiting signs of stress. The idea would be to beam microwaves or lasers at a person.
The reflected beams would carry information about the person’s physiological state, such as breathing rate, similar to the information gathered during a polygraph test. Experts point out that such a system presents serious practical difficulties, however.

news.independent.co.uk

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