INFORMATION TECHNOLOGY FOR DATA AUTHENTICATION BASED ON BLOCKCHAIN TITLE OF MANUSCRIPT

Background. The article describes the process of developing a blockchain-based technology for information support of the processes of authentication of goods. The paper also investigates the performance of the developed system depending on the adjustment of four parameters: mining complexity, dependence of mining time on technical support capacity, dependence of block creation time on the number of transactions, and dependence of blockchain validation time on the number of blocks. Materials and Methods. The mining complexity was analyzed in the range from 1 to 7 (with a complexity of 8 or more, mining on a working device takes too long). This parameter determines the number of zeros that must be at the beginning of the hash to consider the work as confirmed. Each subsequent difficulty increases the total time several times. This is due to a significant increase in the number of operations that need to be performed during mining. Of course, mining also depends on the capacity of the technical support, which should be a complex of advanced processors and video cards. The analysis of the dependence of mining time on the processor frequency was conducted for a mining complexity of 5. Results and Discussion. Additional processor power can significantly reduce mining time. The next study is to analyze the dependence of block creation time on the number of transactions. The main resource burden of this stage is the calculation of hash functions for transactions and for the block, as well as the construction of the hash tree. From the data obtained, we can conclude that the number of transactions in a block is its main resource load. This should be taken into account when choosing the maximum number of transactions per block. The last study was to identify the dependence of blockchain validation time on the number of blocks. The data shows a linear dependence of the blockchain validation time on the number of blocks. Conclusion. This indicates that the validation process is not overloaded with resource-dependent operations. As the blockchain expands over time, the expected duration of blockchain validation can be calculated according to the following linear relationship. Keywords: network communication, information system, counterfeit goods, blockchain technology, product life cycle, intelligent information retrieval system