My Samsung GT-P5200 automatically drops message 'WiFi stating authentication error occurred'. I click Connect and then the message pops out saying 'Incorrect password', then it automatically reconnects for short time before dropping the WiFi again. What's happening?
This is the symptom of a hacking attempt. The attacker sends disconnect packages in order to retrieve the handshake between your device and the router. I strongly recommend you to immediately disable WPS and assign WPA2-Personal TKIP/AES connection. If you are the only one using the Internet, get the MAC address of your device and enable Mac filtering. You might as well change the router/WiFi password.