The Pentagon’s New Laser-Based Tool Uses Your Heartbeat to Track You
First reported by MIT Technology Review, the US Pentagon is developing an infrared laser that captures a person’s unique “cardiac signature” from as far as 200 meters—the length of just over two football fields—away, as long as you’re still. According to Steward Remaly of the Pentagon’s Combating Terrorism Technical Support Office (CTTSO), even longer ranges may be possible with higher intensity lasers.
To Dr. Wenyao Xu at the State University of New York, the heart is a much better surveillance target than facial recognition. “Compared with face, cardiac biometrics are more stable and can reach more than 98 percent accuracy,” he said.
Back in 2017, his team developed a non-contact, remote biometrics device that uses dimensions of the heart as a person’s identifier for security. His system distills the geometry of a person’s heart—measured by refracting sound waves with Doppler radars—to identify the particular shape and size that characterizes an individual. But because it relies on sound waves, the system could only function up to 30 meters away—a fraction of the Pentagon’s ideal distance.