background: poisoning is one of the most common causes of reference to hospitalization in the emergency wards of hospitals. thus, studying and investigating the occurrence of death as the results of poisoning can have a significant role in decision making and improving vital standards to prevent or decrease its occurrence. materials and methods: in this cross-sectional study all cases of suicid...

We show that there exists a natural protocol problem which has a simple solution in the random-oracle (RO) model and which has no solution in the complexity-theoretic (CT) model, namely the problem of constructing a non-interactive communication protocol secure against adaptive adversaries a.k.a. non-interactive non-committing encryption. This separation between the models is due to the so-call...