MODEL OF PROTECTED TRACKING SUBSYSTEM OF RECORDS SYSTEM BASED ON BLOKCHEIN TECHNOLOGY

The characteristics and requirements for document management systems and control subsystems have been analyzed and correlated with security requirements. It is revealed that the main requirements for the control subsystems are: the distribution of responsibility between performers for their actions, fixing the time of the action, ensuring the search for a document, monitoring the location of the document. The ways of ensuring the security of document systems are analyzed. It has been revealed that the possibilities of blockchain technology can be used to build protected control subsystems of document systems. It allows for the distributed storage of registration data, which reduces the likelihood of their loss. The blockchain technology excludes the possibility of making changes to the transaction register, which will not allow to refuse the transaction. The structure of the registration record of the document is proposed, including information on the user's identification numbers, the transaction being performed, and the hash code of the document. The hash code of the record is signed by the person performing the actions in the document system. The structure of the block of records and the algorithm for forming the chain of blocks are proposed. In addition to the registration records, each block contains the hash code of the previous block, the random number field, and the signed hash code of the current block. The formation of a new block is completed after adding a random number to each of the users and generating a hash code. The subscriber subscribes the unit, which has developed a hash-code that meets the established criteria. The directions of the development of blockchain technology in document systems are determined

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