Data management apparatus and data management method
AssigneesToyota Jidosha Kabushiki Kaisha, Scalar Corporation
InventorsNaoki YAMAMURO, Wataru FUKATSU
Life of this patent
Estimating the term…
Abstract
When a second operation to simultaneously update component data D12 to component data D13 and update component data D21 to component data D22 is performed, a controller of a client server creates a record RA3 including a hash value of the component data D13 in a distributed ledger which is a first proof chain and creates a record RB2 including a hash value of the component data D22 in a distributed ledger which is a second proof chain. The controller generates a terminal hash value including a record hash value of the record RA3 and a record hash value of the record RB2 and obtains a time stamp token for the terminal hash value.
Claims8
A data management apparatus that manages data based on a distributed ledger technology, the data management apparatus comprising:
- a storage device where a distributed ledger is stored,
- in the distributed ledger, a record including information on the data being stored in a time-series manner;
- a controller that adds the record to the distributed ledger;
- and
- a communication apparatus configured to communicate with a time stamp authority, wherein
- the data includes first data and second data,
- the distributed ledger includes
- a first distributed ledger where a record including first information on the first data is stored in a time-series manner, and
- a second distributed ledger where a record including second information on the second data is stored in a time-series manner, and
- the controller
- generates a terminal value including information on a record at a terminal in the first distributed ledger and information on a record at a terminal in the second distributed ledger, and
- obtains a time stamp token for the terminal value from the time stamp authority through the communication apparatus.
A data management method by a data management apparatus that manages data based on a distributed ledger technology,
- the data management apparatus including
- a storage device where a distributed ledger is stored, in the distributed ledger, a record including information on the data being stored in a time-series manner,
- a controller that adds the record to the distributed ledger, and
- a communication apparatus configured to communicate with a time stamp authority,
- the data including first data and second data,
- the distributed ledger including
- a first distributed ledger where a record including first information on the first data is stored in a time-series manner, and
- a second distributed ledger where a record including second information on the second data is stored in a time-series manner, the data management method comprising:
- generating a terminal value including information on a record at a terminal in the first distributed ledger and information on a record at a terminal in the second distributed ledger;
- and
- obtaining a time stamp token for the terminal value from the time stamp authority through the communication apparatus.
Dependencies are inferred from the claim text.