With the continuous development of the computer network, the global information has become the general trend of development of human beings. But due to the connection of computer network structure with the diversity, terminal and non-uniformity of distribution network interconnection of openness, etc. In the process of rapid development of the computer network, the network security has been paid more attention. The essential nature of network security is the information safety on the internet. Primary studies have been done in this paper on the aspects of information encryption technology and the network security strategy.