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Information hiding is a general concept which refers to the goal of preventing an adversary from inferring secret information from the observables. Anonymity and Information Flow are examples of this notion. We study the problem of information hiding in systems characterized by the coexistence of randomization and concurrency. It is well known that the presence of nondeterminism, due to the possible interleavings and interactions of the parallel components, can cause unintended informationdoi:10.1016/j.tcs.2011.02.045 fatcat:u5sp2zqf6zholkuy6d6jgcamwm