Digital Watermarking Based Video Device Authentication

Abstract

With the rapid growth of current information technologies, generating, editing and dis- tributing of digital multimedia data (audio, video, image, etc.) became increasingly trivial. Digital videos are in the front line when considering about this multimedia rev- olution. Replacement of classical analog videos with trendy digital videos, has made it easy to immediately capture visual feedbacks in to a video. Properly stored digital videos do not age and it is a proof of "this is what happened". But with the help of powerful video editing programs, it is very easy for an amateur to maliciously modify a digital video and create "perfect forgeries". Therefore it is dif- cult to get video records to stand up as 100% secure evidence in court. Even though videos are tending to get manipulated they are very important in many legal issues. Proving origin of a video is one of the important facts that should prove in a legal case where digital video considered as a silent witness such as in the case of a recording by a surveillance camcorder. It's a challenging task determine the origin of a video, as many malicious attackers can easily manipulate a video with the existing video editing tools. This project was conducted to nd a solution to this problem by incorporating video watermarking technology. A novel digital video device authentication approach based on secure self-embedding and real-time watermarking in the uncompressed domain is proposed to nd the origin of a piece of video footage. Real-time watermark embed- ding is achieved by combining all the processes related to watermark embedding, and by shortening the watermark embedding time by reusing the estimated watermark im- perceptibility among neighboring frames. Frequency domain watermarking is used for ensure the robustness. A prototype system is implemented to evaluate the proposed solution.