Research On Wireless LAN Security Of Power Supply Enterprises

With the development of information technology,based on the IEEE 802.11 standard wireless LAN WLAN equipment in the work and life more and more popular.Wireless LAN technology flexible and convenient features to the user has brought great convenience,at the same time,also introduced a new security issues,security is more fragile than the wired network,especially in the higher security requirements of the use of places will cause serious security risks.Based on the existing multi-subsystem and multi-type users' network architecture,this paper proposes a wireless LAN security model and system architecture which accord with the information security requirements of power supply enterprises.The main work of the paper is as follows:1.Based on the analysis of the traditional security risk of wireless local area network,according to the special industrial environment of power supply enterprises,the paper analyzes the influence of strong interference of power supply enterprises on the transmission of wireless signals,mainly from transmission security,authentication and access security,network security,user security and Management security five aspects of power supply enterprise wireless LAN security needs analysis.2.Based on the security requirements analysis,based on IEEE802.11 n wireless LAN standard and 802.11 i security standards,the use of CCMP protocol to encrypt the data,while the use of MIMO-FODM signal transmission technology and IEEE802.1x and Web + Portal authentication technology Design and give a wireless LAN security plan for power supply enterprises.Then,this article studies wireless LAN transmission security and authentication security.3.For the transmission of data security,the program uses AES algorithm based on CCMP security encryption protocol,the use of its transmission data to complete the encryption and integrity check.In order to verify the security of CCMP protocol,this paper analyzes the CCMP protocol and analyzes its security performance.The wireless local area network(WLAN)of the power supply enterprise is in the environment of strong interference.In order to deal with the interference problem of RF interference,the MIMO-OFDM technology is used to analyze the anti-jamming performance of different space-time codes in different noise environments.4.For the access authentication protocol,the EAP-TLS protocol can not provide two-way authentication between the client and the authentication system in the 802.1x authentication mode,resulting in the flaw of the man-in-the-middle attack,the denial of service attack and the session hijacking attack.In this paper,the digital signaturemechanism is introduced on the key data frame of EAP-TLS to realize the verification of the data frame source and authenticity.The key fields of all EAPOL frames transmitted between the client and the authentication system are encrypted,To achieve the type of data frame hidden.Based on the above way to enhance the EAP-TLS protocol to resist attacks.Through the analysis and simulation of key technology of wireless LAN transmission in power supply enterprises and the analysis and improvement of user access protocol,it shows that the planning scheme has the characteristics of high efficiency,reliability and perfect security mechanism.