Where does OpenSUSE Leap 42.3 with KDE Plasma store wireless passwords?
I tried the files in
/etc/NetworkManager/system-connections but there is no
psk entry in them.
Most likely they are stored in KDE Wallet as it did show up when Wi-Fi was connected for the first time. It offered 2 options of storing passwords: plaintext and some sort of encryption; I selected plaintext with no wallet password. That said, the wifi password must be stored on the system in plain text somewhere. But where?