Patent ID: 11972119
Assignee: HITACHI, LTD.
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 7:
8. A cryptographic operation method for a storage system that comprises: a controller configured to control input and output to and from each of a plurality of storage devices for the input and output requests of data by a host terminal,
wherein the controller includes a memory, a processor, and a cryptographic operation circuit,
the method comprising the steps of:
causing the memory to store format management information that includes information indicating a format of a cryptographic operation corresponding to each of the plurality of storage devices;
causing the processor to determine the format corresponding to a storage device of the plurality of storage devices, from the format management information, based on a request by the host terminal for input and output to and from the storage device; and
causing the cryptographic operation circuit to encrypt data according to the format determined by the processor based on a request by the host terminal for writing the data into the storage device, and decrypt the encrypted data on the data stored in the storage device according to the format determined by the processor based on a request by the host terminal for reading the data from the storage device.