Canon PIXMA MG4200 Series On-Screen Manual page 457

This encrypted key is used to perform WPA2 Personal authentication.
The passphrase should be a string of 8 to 63 alphanumeric characters or a 64-digit
hexadecimal value.
WPS (Wi-Fi Protected Setup)
WPS is a standard for easy and secure establishment of a wireless network.
There are 2 primary methods used in the Wi-Fi Protected Setup:
PIN entry: a mandatory method of setup for all WPS certified devices
Push button configuration (PBC): an actual push button on the hardware or through a simulated
push button in the software.
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