No matter how well a terrorist covers their tracks, or how cool they are under pressure, the Pentagon wants to be able to detect, track, and even positively identify them from a distance. And they want to do it using nothing more than the heat and sweat that emanate from a person’s pores.
The military’s been after scent-based detection systems for years now. In 2007, Pentagon research agency Darpa solicited proposals for sensors to sniff out terrorists using unique genetic markers found in human emanations. The idea was based on research showing that mice each carried a unique “odortype” that was consistent despite variables like stress, hydration or diet. And odortypes are so powerful, they stick around for around a month after their host body has fled the premises.
But the most state-of-the-art tech, known as E-Nose, has only succeeded in distinguishing between two different people, and relies on “detecting human odor from the armpit region.” Now, the Army is launching Identification Based on Individual Scent (IBIS), and wants proposals for a more sophisticated detection system, that could “uniquely identify an individual based on scent,” at a geographical distance or after several hours or even days.