FRAUD TESTING DEVICE AND FRAUD DETECTION SYSTEM

摘要

A confirmation block acquisition unit 81 acquires, from a second block chain, a block confirmation transaction which is a transaction including a first Merkle root hash calculated from a block header of a block within a target range in a first block chain and a block number indicating the block within the range. A fraudulent operation testing unit 82 identifies the block in the first block chain from the block number included in the acquired confirmation transaction, calculates a second Merkle root hash from the block header of the identified block, compares the first and second Merkle root hashes with each other to determine whether there is a match, and detects a fraudulent operation with respect to the identified block.