Video authentication using spatio-temporal signature for surveillance system

Digital video is fundamental of the surveillance system. However, it is easy to be modified by threats that may decrease drastically the trust of the surveillance system. In this paper, we introduce the video authentication that could protect the modification, eventually to increase the confidence and allowed the authenticated videos as evidences in law court. We propose the signature based video authentication using the histogram of oriented gradient of the selected DCT coefficients found in the frequency domain of video frames. The efficiency of our technique depends on an optimal threshold that need to use a high threshold to reject all tampered and improvement is required to allow compression.