Definition
Warchalking refers to drawing chalk symbols in public spaces to show free Wi-Fi hotspots. People practice walking in rural and urban areas by drawing symbols on objects close to Wi-Fi hotspots, such as lamp posts, walls, or sidewalks.
However, these markings may unintentionally advertise Wi-Fi networks left open, posing security threats to the owners.
How Warchalking Functions
- A Wi-Fi enthusiast looks for a network node.
- When they find a Wi-Fi access point, they test whether it can be accessed or not.
- They draw a chalk symbol on a nearby object to publicize the access point, indicating whether it’s open or closed and the type of password it uses.
Elements of Warchalking
- Closed circle: This symbol indicates a closed network node.
- Two back-to-back semicircles: This symbol shows an access point or open network node.
- A large circle with the letter ‘M’: Inside with two small circles attached on either side. This mark refers to an access point that uses a mesh connection.
- A circle with a ‘W’: This symbol indicates that the network node uses a Wired Equivalent Privacy (WEP) password.