On the Secrecy of Interference-Limited Networks under Composite Fading   Channels
  This paper deals with the secrecy capacity of the radio channel in interference-limited regime. We assume that interferers are uniformly scattered over the network area according to a Point Poisson Process and the channel model consists of path-loss, log-normal shadowing and Nakagami-m fading. Both the probability of non-zero secrecy capacity and the secrecy outage probability are then derived in closed-form expressions using tools of stochastic geometry and higher-order statistics. Our numerical results show how the secrecy metrics are affected by the disposition of the desired receiver, the eavesdropper and the legitimate transmitter. 
Hirley Alves and Carlos H.M. de Lima and Pedro. H.J. Nardelli and   Richard Demo Souza and Matti Latva-aho
cs.IT math.IT