A scalable access filter that is used together with others like it in a virtual private network to control access by users at clients in the network to information resources provided by servers in the network. The desired release kinetics are achieved by exposing the surface of the delivery system with a fluid for a desired period of time. In one embodiment, each distributed node also transmits a list of event data references associated with the analysis result to the aggregating node. A third operation is performed by iteratively applying the wavelet model over a series of clock cycles to develop a behavioral model of the system.