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Wi-Fi Protected Access 2 - Pre-Shared Key (also called WPA or WPA2 Personal) is a method of securing your network using WPA2 with the use of the optional Pre-Shared Key (PSK) authentication, which was designed for home users without an enterprise authentication server.

To encrypt a network with WPA2-PSK you provide your router with a plain-English passphrase between 8 and 63 characters long, instead of an encryption key. Using a technology called Temporal Key Integrity Protocol, that passphrase - along with the network SSID - is used to generate unique encryption keys for each wireless client. Those encryption keys are constantly changed.

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