Application of data hiding in audio-video using anti forensics technique for authentication and data security

Steganography is the method of hiding any secret information like password, text, and image, audio behind original cover file. In this paper we proposed the audio-video cryptosteganography which is the combination of image steganography and audio steganography using computer forensics technique as a tool for authentication. Our aim is to hide secret information behind image and audio of video file. As video is the application of many still frames of images and audio, we can select any frame of video and audio for hiding our secret data. Suitable algorithm such as 4LSB is used for image steganography and phase coding algorithm for audio steganography. Suitable parameter ofsecurity and authentication like PSNR, histogram are obtained at receiver and transmitter side which are exactly identical, hence data security can be increased. This paper focus the idea of computer forensics technique and its use of video steganography in both investigative and security manner.