Research And Application Of Security Of WiFi Router In Wireless Communication System

With the development of wireless communication system,the demand of network is increasing now.The intelligent equipment has brought various privacy security issues while bringing the great facility to people,such as account password theft,personal information disclosure and so on.A secure network environment required when using intelligent equipment.Network security incidents often occur around us,the WLAN people commonly used are choosen by attackers generally and its security is the basis of personal information security,so the research of WiFi Router security in the WLAN has great significance.WiFi Router encryption mechanism has been analyzed in this paper.Firstly,the principle of WEP encryption and WEP decryption have been studied,the security holes and the main attack methods for WEP.Then,the WPA/WPA2 encryption mechanism commonly used in most WiFi Routers has been researched in this paper,and analyzes the principle of WPA-PSK/WPA2-PSK encryption and WPA-PSK/WPA2-PSK decryption,and studies the four-way handshake authentication process and attack methods of WPA-PSK/WPA2-PSK.With the development of computer technology,hackers are also improving their attacking methods and efficiency constantly.Currently,this WPA-PSK/WPA2-PSK encryption has been able to unlock the password.The two encryption mechanisms are studied in this paper,and verifies the possibility of declassification by cracking the experiment.In this paper,the crack experiment of WEP encryption was did by Aircrack-ng software firstly.As long as capture enough packets,the security password could be gotten easily.For WPA-PSK/WPA2-PSK encryption mechanism,the password would be gotten by capturing four-way handshake packet through Mimidwep-gtk and running local dictionary software,verified the insecurity of this encryption.The efficiency of cracking depends on the attacker's dictionary size and device configuration,this paper used two methods of crack based on GPU and CPU,and the results show that the computational efficiency of GPU-based cracking is significantly higher than that of using only CPU.Finally,an optimized WPA-PSK/WPA2-PSK encryption mechanism was designed and implementated.Two kinds of optimization methods are designed in this paper,one is the optimization of the four-way handshake process,the random number ANonce and SNonce were transported in plaintext,but now it becomes more safer by AES encryption transmission.Another optimization method is using the WEB authentication way,judging the user authorization information firstly,if not be authorized,need to redirect to the third-party authentication server,enter the account and password,the network can be accessed after authentication.Finally,the safety of WiFi Router are improved by the two optimization methods.