Secure and energy-efficient wireless networks

The countermeasures against these two types of eavesdroppers have been developed based on the specific properties of each type. The thesis has resorted to stochastic geometry to model the presence of passive eavesdroppers and evaluated the amount of leaked information on average. Regarding active eavesdropping, the thesis has developed detection mechanisms in order to detect the abnormality in received signals and designed optimal transmission strategies to cope with active eavesdroppers.<br><br>In order to maintain the power consumption within a limited budget, the trade-off problems between the level of security and the amount of consumed power have been presented.

These trade-off problems have led to lion-convex optimization problems lmt have been solved with the help of path-following algorithms. The existence of at least a sub-optimal solution, which can lie found through a path-following algorithm, has confirmed the feasibility of energy-efficient security at the physical layer.