INFORMATION HIDING IN THE ENCRYPTED VIDEO STREAM BY CODE WORD

Abstract

To maintain security as well as privacy of video it needs to be stored in an encrypted format. For copyright protection, access control and transaction tracking we use data hiding techniques, that can be embedded a secret message and secret image into a video bit stream. The quality of video in the absence of the original reference assesses by data hiding techniques. The edge quality information and the no of the bit streams processed in an encrypted format to maintain security as well as privacy. In this paper hiding information directly in the encrypted version of H.264/AVC video stream is proposed,that proposed scheme includes the three main parts, i.e. encryption of video, embedding and extraction of data.After analyzing the H.264/AVC codec property, the code words of intra prediction modes (IPM), the code words of motion vector differences (MVD), and the code words of residual coefficients are encrypted. The data hider embeds additional data in the encrypted domain, they use the code word substitution technique.The code word substitution technique gives information without knowing the original video content. The extraction of data can be done either in the encrypted or in the decrypted domain.