Patent ID: 11935341
Assignee: DENSO CORPORATION
Field: Computer technology (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 1:
2. A data storage device in a mobile body for defining a normal world and a secure world where access from the normal world is restricted and for storing a data acquired in the mobile body using a blockchain, the data storage device comprising:
a normal storage processing unit that is configured to store an acquired data in a storage area of the normal world;
a block generator that is configured to generate a new block including a hash value based on a last block coupled at last to the blockchain, and a hash value based on the acquired data;
a secure storage processing unit that is configured to store a hash value based on the new block as a block hash value in a storage area of the secure world;
a backup transmitter that is configured to transmit backup data of the acquired data to an external memory; and
a data restorer that is configured to restore the acquired data, using the backup data stored in the external memory when an abnormality occurs in the acquired data.