The Research Of Wireless Network Security Technology Based On Encryption Algorithm And Dynamic Model

Along with the development of information technology, the scale and complexity of network is increasing, wireless network has covered all aspects of people’s work and life, at the same time, network security issues are also growing, especially in wireless network, because of its openness, mobility and network topology dynamic variability, etc., makes wireless network security is an issue of great concern. This article through the analysis research and improve of RC4 algorithm and AES algorithm operation process,and a kind of wireless network security risk assessment model is established, finally, through the establishment of PPDR encryption of the improved model and the dynamic network security model, makes the integrity and security of the wireless network performance is greatly increased.The main research results are:1.In the study of WEP encryption technology based on RC4 algorithm, mainly study the fault into attack、weak key and the algorithm of improved efficiency analysis and simulation of four attack methods applications; The study of WPA2 encryption based on AES algorithm, mainly from the security performance of the AES algorithm, encryption mode, operation speed and other aspects of the study, Finally, a comparative analysis of three kinds of encryption technology.2.Put forward a kind of wireless network security risk assessment model based on chromatographic analysis method and approach to an ideal solution sorting (AHP - TOPSIS method), and the wireless network security risk is assessed. Construction of judgment matrix and using AHP method to determine the weight, finally using TOPSIS method to calculate the degree and wireless network risk assessment values, and reviewing the status of wireless network security.3.Set up a wireless network security model based on dynamic defense PPDR, analyze the security of wireless network, while the model of PPDR was improved, increase the safety management and network system backup and recovery; By establishing a secure encryption and authentication model based on dynamic defense, introduces the concept of dynamic defense to the wireless network information security, finally, the model is analyzed and validated.