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The features of the technique are considered to ensure the security of control and diagnostic information about technological processes is carried out. As an example, a theoretical and experimental assessment of the component realizing this technique is fulfilled. The component of elimination of incompleteness and inconsistency of data analysis (within the framework of the system of their intelligent analytical processing) is analyzed. This component is assessed in terms of expert knowledge and judgments about the quality of software, based on formulated and substantiated quality indicators, taking into account the functional and other requirements for this component. The generalized integral quality indicator and the general quality class of the component are determined.

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A mathematical model of the dynamics of changes in the state of security indicators of control and diagnostic data on the technological process is proposed. It is constructed using Markov chains and takes into account the probabilistic-temporal mechanism for changing the state of data protection indicators of this class. Based on this model, a methodological approach has been developed for multi-criteria assessment of the security of control and diagnostic data on the technological process. The approach is based on the analysis of current deviations of the values of data protection indicators from the requirements for them, takes into account and eliminates the uncertainty of the initial diagnostic information. The proposed methodological approach also allows one to take into account transients that affect security when introducing control over the structure, parameters and modes of collection and processing of control and diagnostic data about the technological process in various conditions.

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