Wi-Fi Protected Access (WPA)
WPA includes the option to use dynamic key exchange, using the Temporal Key Integrity Protocol (TKIP). (Cisco used a proprietary version of TKIP.) WPA allows for the use of either IEEE 802.1X user authentication or simple device authentication using preshared keys. And the encryption algorithm uses the Message Integrity Check (MIC) algorithm, again similar to the process used in the Cisco-proprietary solution.
WPA includes the option to use dynamic key exchange, using the Temporal Key Integrity Protocol (TKIP). (Cisco used a proprietary version of TKIP.) WPA allows for the use of either IEEE 802.1X user authentication or simple device authentication using preshared keys. And the encryption algorithm uses the Message Integrity Check (MIC) algorithm, again similar to the process used in the Cisco-proprietary solution.
WPA had two great benefits. First, it improved security greatly compared to WEP. Second, the Wi-Fi Alliance’s certification program had already enjoyed great success when WPA came out, so vendors had great incentive to support WPA and have their products become WPA-certified by the Wi-Fi Alliance. As a result, PC manufacturers could choose from many wireless NICs, and customers could buy APs from many different vendors, with confidence that WPA security would work well.
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