H.264/AVC Video Encoding with Simultaneous Encryption and Data Hiding Based on Histogram Shifting

Protecting data from intruders is very important in this present scenario. In this work, a method for encoding and encryption of H.264/AVC video and then to embed data in the encrypted H.264/AVC video stream is proposed. Encoding and encryption of the video is done simultaneously. The main 3 stages are video encryption stage, data hiding stage, and data extraction /video decryption stage. In Encryption stage intra prediction mode encryption and Motion vector difference encryption are done. Video encryption is done by using an encryption key. Since the encryption and encoding is done simultaneously computational time can be reduced. Data hiding is the processing of hiding the data in the encrypted video. Data extraction/video decryption step will give the hidden data that have been sending through the video streams and the original video. According to the different applications it can be done in two domain i. e. , in the encrypted domain or in the decrypted domain. Data hiding by XOR based method used in previous work is having problem with visual quality after data removal. Hence a method called histogram shifting is used to improve the visual quality after data removal.