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In this paper we study the overhead introduced by secure functions in considering two models of non-repudiation protocols. The models are specified using the Markovian process algebra PEPA. The basic model suffers from the well known state space explosion problem when tackled using Markov chain analysis. Following previous study of performance modelling on security protocols, mean value analysis and...
The well-known Engset model has been widely used and studied. In this paper, we propose a new state dependent approximation for a special case of the generalized Engset model that considers packet/burst dumping.We also correct here several errors in [7] which considered the same model. Numerical results over a wide range of parameters demonstrate the superiority of the new approximation over previous...
Fluidification constitutes a relaxation technique to study discrete event systems through a continuous approximated model, thus avoiding the state explosion problem. In this paper, the approximation by Timed Continuous Petri nets under infinite server semantics is studied. The main contribution of this work is the addition of gaussian noise in order to obtain a better (but stochastic) approximation...
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