Abstract 1. Information, as further to the energy after a new strategic resources, operational procedures and even influence the war ended in a tie, the first thing. Therefore produce to information warfare Revolution of Military Affairs. 2. In the face of the future of information warfare, in order to get information superiority, message security is more and more important, because the message security is an essential element of information warfare. 3. For the sake of a limited budget, to highly profitable investment do message security, we study cryptography and information hiding.