Various Approaches of Video and Image Stenography: A Review

Steganography is process of hiding secret information behind any image and video file for the secure transmission of data. Video steganography comprises various frames in a single video file from which prediction of secret data availability is not come so easy process. In video steganography various frames has been extracted from a video file and secret information has to be embedded in these frames for transmission of video file. Video steganography comprises various types of data that can be embedded i. e. video data, text data or image data. In this type of steganography various approaches have been proposed yet, but the main issue of security is remaining always because of increase in attack on transmission line. Audio data available in the video file also can be utilized for the purposes of text data steganography. Text data can be easily embedded into audio data which does not distort the quality of audio available in video data. In video steganography the purpose of security is done by using audio and video steganography both in a single video file. Due to two types of data can be send through video steganography.