2.2.1. Stages of implementation of information and psychological impact

It is possible to single out the following stages of IPI implementation [6–11]:


p Ið Þ¼ � A � C p Ið Þ� p Að Þ� =I p Cð Þ =I � A : (3)

To describe the case, the probability of coexistence of several dependent events is equal to the product of the probabilities of these events, and the probability of each next event in the order

It means that the probability of ensuring both integrity and availability and confidentiality of information is equal to the product of the probability of ensuring integrity to the probability of providing availability if there is ensuring of integrity and the probability of ensuring of

As it was mentioned before, the priority of the place of writing in the formula of the corresponding probabilities can be estimated by the experts' opinion, taking into account the complexity of their calculation, caused by the need to implement the corresponding values of the safety criteria levels, according to the physical expressions which describe these criteria

Thus, the described approach makes it possible to model various information systems based on real physical characteristics that allow to predict and evaluate the levels of safety criteria, taking into account the experts and experts' opinions, and it is actual and necessary in practical implementation nowadays [12]. The information security level of the information system can

Along with the impact on the technical and software components of the information system, there are also effects pointed to the staff of the information system (Figure 2). They are information-psychological impacts (IPI) [6–11]. They can lead to a change in the characteristics of employees that are the subject of IPI; as a result, the information security level of the information system may change. As a rule, IPI data are usually transmitted through common

of recording is calculated if all the previous ones also take place.

confidentiality while integrity and availability are provided.

be estimated according to the calculated values (1).

2.2. Model of information-psychological impact on staff

levels [12].

236 Probabilistic Modeling in System Engineering

communication channels.

Figure 2. Impacts on the information system.


In Figure 3, the scheme of IPI is shown.
