An authentication mechanism using Chinese remainder theorem for efficient surveillance video transmission

Now-a-days, surveillance cameras have been widely deployed in various security applications. In many surveillance applications, the background changes very slowly and the foreground objects occupy only a relatively small portion of a video frame. In these type of applications, an efficient solution for transmissions over bandwidth-limited networks is to send only the foreground objects for every frame in real time while the background is sent occasionally. At the receiving end of the transmission, the objects and the most recent background can be fused together and the original frame can be reconstructed. However, protecting the authenticity of the video becomes more challenging in this case as a malicious entity can modify/replace/remove the individual foreground objects and background in the video. In this paper, we propose a Chinese remainder theorem based watermarking mechanism for protecting the authenticity of videos transmitted or stored as objects and background. Our mechanism ensures the authenticity between video objects and their associated background.