Fun fact, the prevalence of cheap 2.4ghz IoT wifi chips coming out of Shenzhen means that router manufacturers have to keep a lot of their new home 5ghz wifi equipment backwards compatible.
Unrelated, but did you know you can make yourself a 2.4ghz pwnagotchi for about $30 plus a usb battery pack?
Standard wifi encryption you'll run into nowadays is WPA2. It works by performing an authentication handshake in which key hashes and things are exchanged as part of a client signing up to the network. The pwnagotchi works by seeking out nearby wifi networks; It then listens for their clients, kicks their clients off the network, and then listens for the authentication handshake when the client attempts to reconnect. Individually, it's a reasonably quick process that the client user never even notices. The handshake that the pwnagotchi acquires, if short or simple enough, can then be used with a hash cracker to find the wifi network's passcode.
A standard pwnagotchi uses a raspberry pi zero w which is like $15 bucks and while it works, its wifi isn't the greatest for long range sniffing. But if you're walking around for a while in an office building , neighborhood, or a more thought out location you can usually find yourself with enough hashes to at least take a stab cracking their wifi passcode. For free wifi or more creative endeavors.
It's a nice and easy introduction to wifi hacking concepts, if that's your thing.
Fun fact, the prevalence of cheap 2.4ghz IoT wifi chips coming out of Shenzhen means that router manufacturers have to keep a lot of their new home 5ghz wifi equipment backwards compatible.
Unrelated, but did you know you can make yourself a 2.4ghz pwnagotchi for about $30 plus a usb battery pack?
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2.4ghz is still the staple connection
A lot of smart devices do not use 5ghz
~
Also the vast majority of users have no idea about or need for the speed difference
Plus keeping some things on 2.4 means 5 is less crowded.
No doubt, but I imagine they wouldn't scoff at the chance to drop 2.4ghz and sell more 5ghz extenders.
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Standard wifi encryption you'll run into nowadays is WPA2. It works by performing an authentication handshake in which key hashes and things are exchanged as part of a client signing up to the network. The pwnagotchi works by seeking out nearby wifi networks; It then listens for their clients, kicks their clients off the network, and then listens for the authentication handshake when the client attempts to reconnect. Individually, it's a reasonably quick process that the client user never even notices. The handshake that the pwnagotchi acquires, if short or simple enough, can then be used with a hash cracker to find the wifi network's passcode.
A standard pwnagotchi uses a raspberry pi zero w which is like $15 bucks and while it works, its wifi isn't the greatest for long range sniffing. But if you're walking around for a while in an office building , neighborhood, or a more thought out location you can usually find yourself with enough hashes to at least take a stab cracking their wifi passcode. For free wifi or more creative endeavors.
It's a nice and easy introduction to wifi hacking concepts, if that's your thing.