Information theft when using Wi-Fi
Wi-Fi networks are available just about anywhere. We find them in shopping malls, stations, airports... Now, are they all safe? The truth is that no. We can run into wireless access points that are created solely to put our privacy at risk.
How could they impersonate our identity over Wi-Fi? Basically what the attacker is going to do is collect all the data that we send or receive. For example, if we log into a social network, in the mail, in a forum... Also even if we use an instant messaging program and send messages.
What the hacker is going to do is create a fake access point, which pretends to be a legitimate Wi-Fi network but actually controls it. This way the entire connection can go through that attacker. This is what is known as a Man in the Middle attack.