Patent ID: 9336412
Filing Date: 2016-05-10
CPC Classification: G06F,G11B,H04L

Claim Text:
1. A storage system comprising a controller and one or more storage media; wherein a host for reading and writing data in the storage media and a management terminal for performing a management operation of the storage system are connected to the storage system; the controller has a storage area for storing an encryption key, and when a write request from the host is received, the controller creates a validation information corresponding to data accompanying the write request, adds the validation information to the data, encrypts the data having the validation information added thereto using the encryption key stored in the storage area and stores the same in the storage media; when a second encryption key is stored in the storage area, prior to receiving an access request to the storage media from the host, the controller: reads the encrypted data having the validation information added thereto and stored in the storage media; decrypts the encrypted data having the validation information added thereto using the second encryption key; validates the decrypted data using the decrypted validation information; and when the result of the validation is abnormal, displays that abnormality has occurred on a management screen of the management terminal, and wherein the validation information includes a position information of the data write destination included in the write request; and when validating the decrypted data using the validation information, the controller: displays that abnormality has occurred on the management screen of the management terminal if the information related to the storage position of the encrypted data stored in the storage media and the position information of the write destination of the data included in the decrypted validation information are inconsistent.