Abstract
Due to the high rate, flexible of WLAN technology, it is easy to install, expand and economical advantages, which can meet virtually business or internet application needs. However, wireless network security problems in the process of rapid application brought in more and more people's attention. This paper introduces the concept and 802.11 WLAN security standards from the generation algorithm based --RC4 WEP security mechanism to explain the principles of the WEP security mechanism and processing. The decryption process was for analyzing the shortcomings of WEP security mechanism and vulnerabilities, the current attacks against WEP and intrusion methods. Finally, two improved methods TKIP protocol improvements and AES_CCM improved system for a detailed description. Security issues will continue to be the biggest obstacle to the wireless LAN industry.
