Research On Video Steganalysis Algorithms

The development of IT industry brings much convenience but many information security problems as well. In the 1990s, data hiding techniques arose, which can protect messages by embedding them into innocent-looking cover objects and then transmitting them through open channels without suspects. With the release of some free steganography softwares, information security issues become more secure, and more attention is paid to steganalysis. However, researches mainly focus on attacking image steganography, and little work has been done on video steganalysis till now. But as rich video resources can provide essential channels for secret communication, video steganalytic research is certain to be the focus of many groups.Current video steganography softwares fall into two categories, one of which exploits reduandancy in file formats, including Steganography, Hider, Max File Encryption, etc; the other embeds messages into video contents, including MSU StegoVideo, the only one found at present. For the former, file format checking programes can break it; for the latter, however, combined with deep analysis of its embedding mechanism, targeted attacking schemes need to be designed.This paper firstly introduces the concept of information hiding, describes the features, classification, typical algorithms and applications of video steganography. Secondly, relates the elementary knowledge of steganalysis, and discusses some popular methods of it. Based on characteristics of video steganalysis, corresponding strategies are proposed. Finally comes the body of the author's work, that is the steganalysis of several public video steganography softwares. Softwares in the former category are analyzed in part 4 of the thesis, while MSU StegoVideo in latter category is analyzed in part 5, according to the specific mode of its embedding mechanism, an inter-frame mode detection algorithm is designed. Experimental resutls show that the proposed scheme can effectively detect whether a video has been processed by MSU or not.