Garrett: Wifi deauthentication attacks and home security

Matthew Garrett works out how to avoid being recorded by "Ring" door cameras in his apartment building. "The most interesting one here is the deauthentication frame that access points can use to tell clients that they're no longer welcome. These can be sent for a variety of reasons, including resource exhaustion or authentication failure. And, by default, they're entirely unprotected. Anyone can inject such a frame into your network and cause clients to believe they're no longer authorised to use the network, at which point they'll have to go through a new authentication cycle - and while they're doing that, they're not able to send any other packets."

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