In The Infrastructures of Security, author Martin J. Murray concentrates on not only the turn toward technological solutions to managing the risk of crime through digital (and software-based) surveillance and automated information systems, but also the introduction of somewhat bizarre and fly-by-night experimental "answers" to perceived risk and danger. Digitalized surveillance is significant for two reasons: first, it enables monitoring to take place across wide "geographical distances with little time delay"; and second, it allows for the active sorting, identification, and "tracking of bodies, behaviors, and characteristics of subject populations on a continuous, real-time basis." These new software-based surveillance technologies represent monitoring, tracking, and information gathering without walls, towers, or guards.