Use of video is prevalent in many communication contexts (live and recorded Telepresence, video calls, video broadcasts, etc.). Video security has grown in prominence in recent years. Video security is a top priority for many law enforcement organizations and governments. Video security can be used for various purposes, such as in evidentiary contexts, which would require suitable authentication to ensure that the video is unaltered/unchanged. Stated in different terminology, a video (e.g., used in courtroom) should be demonstrated to exist in its original form and, further, that the video is a true representation of an occurrence. If the video were to be altered due to certain events (e.g., packet drops, aging, etc.), these events should be detectable and suitably accounted for.
Additionally, the ability to precisely identify a tampered frame is important in the context of malicious tampering. Note that all of these security functions should be available without having to access the actual camera/source that generated the video. Many video security systems implement forms of watermarking at a source; however, these watermarking techniques can be easily defeated. Without a comprehensive video security system, fraudulent video can become common and pose a significant dilemma for security personnel, network administrators, and corporate managers alike. Protocols should be developed to verify that video has not been tampered with since its generation at its source.