Fig. 4
From: Designing challenge questions for location‐based authentication systems: a real‐life study
A screenshot showing example of Type ‐ 4 question. A user need to right click on a desired location once the zoom level is 17 or higher to select a location in this question type. The marker specifies the user’s selected location. When a user reaches zoom level of 17, he/she will be informed by seeing a message at the top of the page (the message bar turns from red to green) and the right‐clicking gets enabled to let a user select a location on the map