[IEEE 2016 International Conference On Cyber Situational Awareness, Data Analytics And Assessment (CyberSA) - London, United Kingdom (2016.6.13-2016.6.14)] 2016 International Conference On Cyber Situational Awareness, Data Analytics And Assessment (CyberSA) - Enhancing WPA2-PSK four-way handshaking after re-authentication to deal with de-authentication followed by brute-force attack a novel re-authentication protocol