An Approach for Data Protection Using Video Steganography Technique and Cryptography

Abstract

In the era of fast information interchange using internet and World Wide Web, video Steganography has become essential tool for information security. The video data contains a massive amount of data redundancy which can be utilized for embedding secret data. In this thesis is based on a combination of steganography and cryptography techniques to increase the level of security and to make the system more complex to be defeated by attackers. In this work Video Steganography achieved by hiding secret information into video (stream of moving images and sound), AVI file is separated into two parts, video and audio. The video is a stream of frames; each frame is stored as a bmp file image and a number of frames required or needed to be used as a cover are chosen. To improve the security of the proposed algorithm, a secret message is first encrypted by using AES-128 Algorithm. Advanced Encryption Standard is most secure and robust cryptographic algorithm and a variable-length key would make cryptanalysis more difficult for potential attackers then, it is embedded into the discrete cosine transform (DCT) coefficients of video frames. The hidden message is embedded into DCT coefficients of each Red, Green, and Blue planes in the middle frequency excluding DC coefficients. So it becomes very difficult for intruder to guess that a secret message is hidden in the video as individual frames are very difficult to analyze in a video. Experimental results show that the proposed algorithm gets successful hiding information into the cover video. Good results have been obtained by using quality metrics (MSE, and PSNR) which calculate the values of distortion results from embedding steganography in digital video .