A security researcher at the University of Leuven in Belgium recently discovered a serious weakness in Wi-Fi Protected Access 2 (WPA2), a protocol that secures almost all modern Wi-Fi networks, potentially exposing wireless Internet traffic to eavesdroppers and attackers.
The flaw is known as KRACK, short for Key Reinstallation AttaCK, and it could allow a hacker within range of your router, smartphone, computer or other wireless device to break encryption.
