Secure Transmission Strategy of Network Communication layer Relay based on Satellite Transmission

In recent years, the continuous development of wireless communication technology has brought great convenience to people’s work and life. However, due to the openness of the wireless channel, the information is vulnerable to eavesdropping and interference from illegal users in the process of transmission. As usual, the security of information and information is guaranteed by the high-level encryption system, but with the increasing strength of the computing power of computers, the traditional encryption system has not been fully implemented which cannot meet the security requirements of the current wireless communication network. With the development of information technology, satellite communication has been widely used, especially in the military field. However, with the increasingly severe and complex military struggle, higher requirements are put forward for the security and anti-jamming capability of satellite communications. In the satellite communication support and training, we often find that once the polarization angle of the antenna feed module changes, the signal intensity also changes. At the same time, in order to solve the problem that the trust information of both sides of the ship data transmission method is lost in the case of a large amount of data, which leads to the abnormal security of data transmission, this paper studies the application of network security encryption technology in warship data transmission. Through the chaotic map transformation to update the key value in the register, the wheel key component is obtained. Then based on which the network transmission encryption algorithm is designed, the encryption of each data transmission is realized through iterative calculation. And the secure communication protocol of data transmission is designed at the same time. The information of both parties is exchanged before transmission, the two-way identity authentication is realized, and the ship data is transmitted after the authentication is completed. The polarization characteristic of the signal has a good performance in the nonlinear response of the device, the alleviation of the shortage of spectrum resources, anti-interference and so on.