![]() ![]() You might be able to recover the temporary key, but you can't use this by itself to join the router, and the key is thrown away when that user makes a new connection. These temporary keys (which are exchanged during the handshake, and encrypted by something which involves your original keys) are then used to encrypt user data.īecause the data are encrypted with new keys for each connection, and those keys aren't based on the original keys in any way, knowing the plain text version of the data you're trying to decrypt doesn't help. The key you need to crack on a Wireless Router isn't the key that's used for actual encryption of data, but rather the key used to set up that encryption in the first place.īasically, your keys are used to handshake with the access point, and then exchange a new set of temporary keys for the duration of your connection. This is a reasonable guess at how encryption works, but it's also flawed. ![]() You can fit here anything from "press here if you agree to behave" to complete walled garden like hotspot on a train that shows you interactive map, schedule and transport connections available on the next stop along with small banner asking $1 for full internet access. ![]() Sure, this is not the most efficient protocol, but up-side is - it's open-ended. Step 2) Mobile device reuse same cookies for the same portal second time around, so portal can recognize returning user and let them in without annoying with login prompt each time.Īssuming mobile device has a separate cookie jar for this, and captive portal is HTTPS with proper certificate, and doesn't try to break other people's SSL, that is pretty secure. ![]() and bring up UI (sandboxed browser) if anything else than expected short 2xx was received. Step 1) For mobile device to make a request to a special URL that is known to respond with short 200/204, something like that: State-of-art for captive portal handling is: ![]()
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