The practice of tagging pavement with codes displaying where wi-fi access is available is War chalking.
What is wi-fi?
Wi-Fi is a wireless network technology that was created to allow end users and network equipment like computers, smartphones, routers, and switches to communicate with one another via the Internet or over a live network connection.
Wireless Equivalency Protocol (WEP)
As a standard wireless protocol, Wireless Equivalency Protocol (WEP) was created to offer a high level of security and anonymity on 802.11b wireless local area networks (WLAN).
The IEEE Wireless Fidelity (Wi-Fi) standard defines "war chalking" as merely the act of marking pavement with codes that indicate where wi-fi service is accessible.
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