BLOCKCHAIN SYSTEM, AND DATA TRANSACTION SYSTEM IN WHICH BLOCKCHAIN SYSTEM IS USED

摘要

[Problem] To execute processes for determining and confirming the validity of edit data in each block of a blockchain easily and with high security, and also to execute authority verification with which it is possible to verify the authority of editing edit data and confirm the content of editing. [Solution] A blockchain system comprising a plurality of computer systems, data processing applications, and a blockchain creation unit for constructing a blockchain in common, each block or data having open and close passcodes set therefor, and each of the data processing applications being provided with an unlocking function for opening data in a block in response to the input of an open passcode, a data editing function for editing data, and a locking function for normally terminating and closing edited data in response to the input of a close passcode. The edit data and the hash value data in a block are exchanged between blockchains. Blockchains are constructed in advance by the blockchain creation unit.