> By Guillaume Valadon, Florian Le Goff and Christophe Berger
This pie chart represents the security modes of nearly 40 000 Wi-Fi access points. This information was collected by walking in the streets of two Paris districts: 5th and 13th, from August 2007 to November 2007. There are two striking results: (1) WEP is still widely used even though it has proven to be unsafe since 2001, and (2) WPA-PSK accounts for a high number of Wi-Fi access points due to the fact that most French ISP now ship access points in this mode by default.
In the chart, “Open – ISP” accounts for ISP using Open access points as part of their business whereas “Open – not ISP” accounts for access points that do not fall in this category. The same applies for “WPA – not ISP” and “WPA – ISP”.
Note: unlike WPA-PSK, WPA is mainly used in secured enterprise deployments and relies on an authentication server such as Radius.