Tatyana Deryugina (Twitter: @TDeryugina)

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“Free Public Wi-Fi”

Posted 29 Jan 11 by Tatyana

It seems as though wherever you go, you see "Free Public Wi-Fi”, an "Unsecured computer-to-computer” network. As far as I could tell, it’s completely useless, but maybe that’s because I have no idea how I could use it productively. So I decided to look into it, and here’s what I found out. The basic message is: don’t connect to these networks!

A "computer-to-computer”  network allows two computers that have Wi-Fi to connect to each other without an external internet connection. In some cases, you expose yourself to risk by connecting to networks like these: it could be someone trying to get into your computer by promising you "free” wi-fi and hoping you’ll connect to their computer. In other (probably most) cases, these networks are other people’s computers sending out signals. In particular, if your computer can’t find a preferred network (and it’s running an older version of Windows XP),  it will create an ad-hoc network with the same name as the last network it connected to, according to this article.

For interesting details about how these networks spread, see this article.


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