IEEE 802.11 Wireless Lan Security

檢視了文章IEEE 802.11 Wireless Lan Security overview，大概明白無線網絡中的一些東西。

無線網絡與有線網絡的很大的不同是信号分布的到處都是，是以很容易被監聽，這樣網絡中資料安全的傳輸就成為了很大的問題，于是人們發明了各種方法來保證資料的正确的傳輸，這個就是所謂的Wireless Lan Security.

無線區域網路中，連接配接AP，必須要認證(authentication) ,目前主要的的Sceurity技術如下：

There are several security technologies introduced to 

solve the authentication problem and to preserve the 

privacy and integrity of data transmitted on air. 

IEEE802.11 specified three basic security technologies 

to authenticate access to the WLAN and to preserve the 

privacy of data transmitted, they are open system 

authentication, shared key authentication and WEP [1] .  

Because of the shortcoming of security technologies in 

IEEE802.11, Wi-Fi Alliance released a new security 

standard for the industry called "Wi-Fi Protected 

Access" (WPA) [8] .  WPA added two more technologies, 

namely, IEEE802.1x to improve authentication and 

TKIP for privacy and integrity of information. Recently 

IEEE published a new security standard for WLANs, the 

new standard is IEEE802.11i [22] ,  the new standard 

provides enhancements of the security shortcomings of 

WEP and it comprises all security technologies in WPA. 

In addition to that, IEEE802.11i adopts recently certified 

encryption algorithm called the "Advanced Encryption 

Standard" (AES). 

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