what is a passphrase for wifi
WEP Key Passphrase. A wireless network key is an encryption key for that prevents unauthorized users from accessing a specific wireless network. The user creates wireless network keys, which either a wireless router or a computer that is connected to that wireless router can manage.
WPA is a wireless encryption format and the passphrase is in the wireless security section of your router. Here is a link to one of the Sticky topics at the top of this forkum that should be of assistance.