Warchalking is the drawing of symbols in public places to advertise an open Wi-Fi wireless network. Examples of such markings can be found on the streets advertised with these distinct markings indicating wifi access points and information about them.
Having found a Wi-Fi node, the warchalker draws a special symbol on a nearby object, such as a wall, the pavement, or a lamp post.
A closed node usually follows with an SSID marking on top of the symbol if available. An open node should display the SSID on top and how many mbits on the bottom.
Here are some examples of these street symbols:
This indicates a closed WEP encrypted signal is in the area.
This indicates an open wifi signal is in the area.
So next time your walking in a populated area, look out for these distinct wifi symbols.
This is really interesting. I wonder if students will get into the act and start writing them outside their dorms if they’ve got an AP.