Are there WiFi interceptors?

Question

WiFi

Good afternoon!
Probably everyone in the movies at least once heard about Wi-Fi interceptors, laptops with free internet, and so on. Does this exist in real life? In theory, Wi-Fi is an ordinary wave signal, which, if you have a special device, you can easily catch, decrypt, and even send your own signal. Only I don’t see anything like this on the Internet - is it fiction? Or are there such devices? Then tell me, please, what are they called and where to look at all? The goal is trivial - to get access to any wi-fi. I do not need other people's data, as many people want, I just need the Internet in any place where there is a password-protected wi-fi. Is it possible?)

Answer 1

Many (usually not the cheapest, found in regular android phones) wifi adapters for which you can set the monitor mode and read the surrounding air.
There is software that allows you to analyze packets and even crack passwords (including the usual enumeration in a dictionary), and you can simply crack some weak encryption modes
.
https://habr.com/post/334966/
And in general, try to google at least sometimes. it's so easy
site:habr.com hack wifi
ps I answer the last question - is it possible, yes, but it's cheaper to pay a subscriber about 200-300 r per month and use LTE / 3G, since it is already almost everywhere.

Answer 2

For example , this one
scans 2.4 GHz, it also has 5 GHz.
But the traffic that you intercept will be encrypted

Answer 3

In the form described in the question, no. Of course, it is possible to break some access points, especially those that use the old authorization mechanisms, but this does not require any kind of hardware, this is solved by software.