Biometric Security (IMAGE) DOE/Sandia National Laboratories Caption Sandia National Laboratories is testing biometric technology that uses unique electrocardiogram signals sent from a wearable device, possibly a wristband or chest strap, to identify a person for security purposes. Credit Illustration by Michael Vittitow, Sandia National Laboratories Usage Restrictions Please credit Sandia National Laboratories License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.