7Chapter Surveillance Techniques
To surveil is to watch another, whether by personal observation or technological means. Surveillance is an integral component for any security practice, but its object, that is the person surveilled, and the activities under scrutiny, are unknowing subjects. To have any effectiveness, surveillance needs to take place without notice or public awareness. The use of surveillance should be a blend of the aggressive and the cautious. Aggressive in the sense that it is one of the more remarkable tools in the security professional’s toolbox, while simultaneously recognizing the privacy implications of its usage.