Abstract:

When thinking of information hidding technology, despite the fact that many positive results in the application field have been achieved, some basic problems in its basic theory are still remained. Starting with the feature of the information, a new theory of the generalized information hiding as well as the model buit was suggested when the research on the mechanism of the information hiding was done. And, many traditional steganography and modern information hiding methods was reasonably illustrated. An important conclusion shows that the existance of covered messages is not the necessary condition for information hidding.

Key words: information hiding, steganography, mechanism, model