Video Steganography: A Survey

Recent advances in information technology have made quick delivery and sharing of multimedia information possible. But these advances in technology are leading breaches to information security and personal information. Digital Steganography provides capability to protect private communication that has become necessity in today's Internet era. Steganography is a technique to protect and conceal multimedia information in disguised manner or we can say it is the study of invisible communication. Steganography is a mixture of compression, encryption, watermarking and cryptography. Generally sharing of information takes place in the form of text, image, audio and video. Steganography uses image, text, video and audio to disguise secret information. In this paper we have analyzed only video steganography. In video steganography secret information is enveloped inside a video to make it safe from intruders. In this paper we have critically analyzed fundamental concepts, performance metrics and security aspects of video steganography. Different methods used for protecting secret information by using a video as cover media are explored. Comparisons between different video steganography techniques are also provided. Steganalysis is also discussed in brief.