WPA2
IEEE 802.11i is an amendment to the 802.11 standard specifying security mechanisms for wireless networks (see Wi-Fi). The draft standard was ratified on 24 June, 2004, and supercedes the previous security specification, Wired Equivalent Privacy (WEP), which was shown to have severe security weaknesses. Wi-Fi Protected Access (WPA) had previously been introduced by the Wi-Fi Alliance as an intermediate solution to WEP insecurities. It implemented a subset of 802.11i; the Wi-Fi Alliance also refer to the new standard as WPA2. 802.11i makes use of the Advanced Encryption Standard (AES) block cipher; WEP and WPA use only the RC4 stream cipher.
In addition to improved encryption, the standard includes improvements in key management, user authentication through 802.1x and data integrity of headers and contents using CCMP.
See also
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