Cryptographic Recursive Control of Integrity of Metadata Electronic Documents. Part 4. Evaluation of results

The purpose of the study is to obtain a numerical assessment of the results of the application, previously presented by the authors, of the method of cryptographic recursive 2-D control of the integrity of the metadata of electronic documents. Research methods: logical-probabilistic method I.A. Ryabinin. Research result: a necessary condition for maintaining the integrity of electronic documents processed by automated information systems for electronic document management is to ensure the required level of metadata security. To evaluate the research results, the probability of violation of the integrity of electronic documents (through destructive influences of authorized users on metadata) was chosen as an indicator of efficiency. The presented approach to the construction of logical-probabilistic models for assessing the level of security of metadata of electronic documents allows in practice to obtain numerical values of the probabilities of transition of the systems under consideration to a dangerous state (associated with a violation of the integrity of the metadata of electronic documents), taking into account the structure of such systems and the real conditions of their functioning. The effect of using the developed method, under the conditions of destructive influences of authorized users (insiders), in comparison with the known solutions (using a hash function) of such problems, is 67% under the given assumptions.