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Wi-Fi Protected Access 2 (WPA2) builds upon WPA, which makes them very similar. Both support identical Extensible Authentication Protocol (EAP) types in an enterprise environment, as well as allowing pre-shared keys (PSKs). Group key transmission is performed by the two-way handshake, while the four-way handshake is used for unicast generation.
The main differences are as follows:
- WPA requires Temporal Key Integrity Protocol (TKIP), and it supports Advanced Encryption System (AES), which provides a stronger encryption
- WPA2 requires AES, and it does not support TKIP
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