Context acquisition can mainly be done in two ways namely,
explicit and implicit [6]. In explicit context information
acquisition, the user is aware that context information is
being collected for use by an application and the user usually
needs to give consent for the information to be collected [2,
6]. For example, location sensors in many web browsers
require that the user gives consent to share current location
information with the application [29]. The user decides
whether to accept or decline sharing the location details with
the application.