  Research on data confidentiality, integrity and availability is gaining
momentum in the ICT community, due to the intrinsically insecure nature of the
Internet. While many distributed systems and services are now based on secure
communication protocols to avoid eavesdropping and protect confidentiality, the
techniques usually employed in distributed simulations do not consider these
issues at all. This is probably due to the fact that many real-world simulators
rely on monolithic, offline approaches and therefore the issues above do not
apply. However, the complexity of the systems to be simulated, and the rise of
distributed and cloud based simulation, now impose the adoption of secure
simulation architectures. This paper presents a solution to ensure both
anonymity and confidentiality in distributed simulations. A performance
evaluation based on an anonymized distributed simulator is used for quantifying
the performance penalty for being anonymous. The obtained results show that
this is a viable solution.
