The first two steps of four-way handshake involve the client and the access point making sure that they have the right password. This handshake is a series of messages exchanged between a client device like your phone and access point like your router when they are establishing a secure connection. Krack is a short form of Key Re-installation Attack which exploits a process that’s an important part of WPA2 security, which is known as four-way handshake. It was developed in 2004 and was mathematically proven to be safe and to not give any passwords or encryption keys, which it doesn’t but the new vulnerability known as Krack gives hackers a potential work around. The security that encrypts almost all Wi-Fi networks is WPA2 short for Wi-Fi protected access. This vulnerability discovered by Belgian security researcher Mathy Vanhoef could let hackers do things like steal credit card numbers or inject malware wherever there is Wi-Fi.
We have got our phones, computers, watches connected into our personal networks and also the IoT gadgets like refrigerators and network-enabled juice presses.
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