The IEEE® 802.1X™ standard specifies the PSK protocol as an access control method for enterprise Wi-Fi® networks. You can also use the PSK protocol in small-office environments and home environments where it is not feasible to configure server-based authentication.
To configure the PSK protocol, you must send a passphrase that matches the key or passphrase for the wireless access points to a Wi-Fi enabled BlackBerry® device. The access points and BlackBerry device use a passphrase to generate layer 2 encryption keys. The passphrase can be up to 256 bits. All access points and each BlackBerry device in your organization must share the same passphrase.
The PSK protocol is designed to use TKIP keys or AES-CCMP keys to protect communications over the enterprise Wi-Fi network. The PSK protocol relies on the passphrase to control whether a Wi-Fi enabled device (such as a computer or BlackBerry device) can access the enterprise Wi-Fi network.