Somewhere before I noticed that there was a free network near me, then the connection to my internet started to break or become weaker, so I decided to try how it is with the free one. I connected and it was very good and so when I didn't catch mine I connected there, but recently I noticed that under the network it says that other users can see the information I send on this network. Will someone more enlightened explain to me why this is so.
Answers 3
They can sniff your traffic and access your passwords if they are not encrypted, etc. Depending on your computer settings, shared folders can also be accessed if you allow it. In general, don't worry, but keep one thing in mind.
When the wireless network connection is not encrypted, virtually anyone with a wireless device can eavesdrop on your traffic (and this includes passwords for various sites, encryption keys for banks, private keys for bitcoins, etc.). Even when it's encrypted, anyone can eavesdrop on it, but you have to decrypt it before you can understand something that's much harder. You remember that radio waves are not like a cable - you have to connect to it to find out who is transmitting what. If you broadcast the signal - everyone around can catch it.
This is because when the network is free, hackers can connect to it, which through certain programs can break into your computer and extract valuable information such as credit card numbers, passwords, etc., but very often some deliberately unlock their networks, just give free internet to the neighbors and there is no problem, but you have no way of knowing whether it is so or not.