Researchers have discovered several security vulnerabilities in implementations of Wi-Fi Protected Access two (WPA2)’s 4-way handshake, which is used by nearly all protected Wi-Fi networks.
http://feedproxy.google.com/~r/Securityweek/~3/7pRPfoV8Ob0/researchers-find-flaws-wpa2s-4-way-handshake-implementations
