Contextual environmental information has been used recently for designing security mechanisms. One of the example is to defend zero interaction authentication against relay attacks.  The thesis topic's goal is to: (1) investigate in a mechanism that allows a group of paired devices to perform collaborative sensing, and (2) investigate in fusion algorithms to combine data of similar sensor modalities observed by a number of different sensors.

More details: http://www.cs.helsinki.fi/group/secures/topics.html#thesis