Fig. 7
From: Designing challenge questions for location‐based authentication systems: a real‐life study
Visualization of locations chosen by naive adversaries within 1 km radius of UCONN, Storrs campus. The darker red colors indicate the most popular locations that are often selected by naive adversaries. Examples of the most popular locations selected by the naive adversarial users were UCONN’s Student Union Building, Main Library, and Northwest Dorm