From the Executive Summary: "In recent years, we have seen great progress in contactless biometrics for entities requiring accurate and expeditious identification. In this whitepaper, we address the state of the art technology and techniques in identifying individuals using contactless biometrics such as face, gait and voice recognition for the purposes of identification, investigation and authentication of individuals. We examine the limitations and challenges and identify the obstacles that must be overcome in order for this technology to reach its full promise. In particular, we examine ways in which law enforcement agencies and private sector companies can leverage these new forms of Personal Identifying Information (PII) without encroaching on civil liberties or compromising intellectual property. We conclude with recommendations for the path forward in public/private collaboration in this area."
Office of the Director of National Intelligence: https://www.dni.gov/