Study on Theoretical-security of Information-hiding

This paper analyzes the theoretical-security model based on the theory of hypothesis testing proposed by Cachin, pointes out both visual and statistical characteristics should be restricted in the process of information-hiding theoretical-security modeling. An innovative security model is created in the way to restrict the variation of both visual and statistical characteristics by confining the value of conditional transferred probability. The security model of information-hiding based on digital images is established through analyzing the specific characteristics of digital maps in two ways. The sufficient and necessary conditions are summarized in conclusion.