GUILFORD, U.K. — WiFi networks worldwide could contain a security flaw that lets hackers disrupt internet traffic, according to researchers. <br /> <br />A hacker in range of a WiFi network would be able load viruses onto the network, read and gather communications like passwords, credit card numbers and photos sent, the Telegraph reported. <br /> <br />Experts call it a "Krack" attack and say it's a "fundamental flaw" in wireless security techniques, with Apple, Android and Windows software all vulnerable to some extent. <br /> <br />The Krack attack takes advantage of the "handshake" between device and router to insert a "key" that can decrypt communications to allow things like passwords and credit card data to be stolen, according to the Telegraph. <br /> <br />Researchers suggest only connecting to secured WiFi networks and avoiding unsecured networks like those hotels, coffee shops and public spaces. <br /> <br />Most banking and online shopping websites use https, an encryption technique that protects against Krack attacks. <br /> <br />Security analysts also suggest updating your router, although updates for Krack attacks may not be available yet.
