Enhancing the security of digital Video Watermarking using watermark encryption
Ujan Mukhopadhyay, Souptik Sinha, Poulomi Ghosh, Rilok Ghosh, Dipak Kr. Kole, Aruna Chakroborty · 2012
Video Watermarking is a very popular and effective way of copyright protection of videos. But in some cases simple watermarking is not enough because security has become a major concern with the rapid development of technology and internet access. Thus, to enhance the security of the embedded watermark, in this paper the watermark is encrypted using a key known only to the author. The encrypted watermark is then embedded into the frames of the video. According to necessity, the encrypted watermark can be extracted, and then decrypted using the author's key, to regain the original information. This will confirm the authenticity of the video as indicated by the watermark as well as increase the security of the information. The strength of this scheme lies in the fact that without the key, it is very difficult to decrypt the watermark. If the size of the watermark be n X m, then an attacker will have to consider m possibilities to guess the key. Also, in absence of the original, un-watermarked video, extraction of the watermark is practically impossible.