In this paper, we present ESauron — the first proof-of-concept system that can detect diverse forms of spy cameras (i.e., wireless, wired and offline devices) and quickly pinpoint their locations. The key observation is that, for all spy cameras, the captured raw images must be first digested (e.g., encoding and compression) in the video-capture devices before transferring to target receiver or storage medium. This digestion process takes place in an inbuilt read-write memory whose operations ca...