I will describe some problems arising in wireless networking and their formulation in terms of stochastic point process models. The model is a marked Poisson process on the plane or a bounded domain, points of which represent wireless transmitters. The marks have two different interpretations. In one interpretation, they represent a choice of channels for transmission, and the quantity of interest is some measure of interference between transmitters on the same channel. In another, the marks correspond to sets of cryptographic keys, and we are interested in the connectivity of the resulting random graph.