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Wireless Protected
Access is a security solution adopted by the Wi-Fi Alliance that adds authentication to
WEP (Wired Equivalent Privacy)'s basic encryption. For authentication, WPA specifies
IEEE 802.1x authentication with Extensible Authentication Protocol (EAP). For encryption,
WPA uses the TKIP (Temporal Key Integrity Protocol) mechanism, which shares a starting key
between devices, and then changes their encryption key for every packet. CA (Certificate Authority) can also be used. Also part of the encryption mechanism are 802.1x for
dynamic key distribution and MIC (Message Integrity Check or Code ).
WPA requires that all
computers and devices have WPA software.