Method for calculating confirmation reliability for blockchain based transaction and Blockchain network monitoring system for performing the method

METHOD FOR CALCULATING CONFIRMATION RELIABILITY FOR BLOCKCHAIN BASED TRANSACTION AND BLOCKCHAIN NETWORK MONITORING SYSTEM FOR PERFORMING THE METHOD Provided is a method comprising acquiring information on a branch formed on blockchain data, calculating a difference in a block height between a target block corresponding to a current block height of the blockchain data and a block in a non-branched state based on the information on the branch and calculating a transaction confirmation reliability of transaction data recorded in the target block based on the difference in the block height, wherein the transaction confirmation reliability indicates a probability that, for as k blocks are further connected after the target block, a position of the block at which the transaction data is recorded will not change, wherein k is an integer greater than zero. FIG. 9