Lossless authentication of MPEG-2 video

In authentication using watermarking, the original media needs to be slightly modified in order to embed a short media digest in the media itself. Lossless authentication watermarking achieves the same goal with the advantage that the distortion can be erased if media authenticity is positively verified. We extend lossless data embedding methods, originally developed for the JPEG image format, to digital video in the MPEG-2 format. Two new lossless watermarking methods for authentication of digital videos are presented. In the first, each frame contains its hash embedded losslessly, while in the second, we embed a hash for a group of frames in B frames only. Implementation issues, such as real-time performance, are also addressed.