Patent ID: 8090100
Filing Date: 2012-01-03
Classification: G06F,H04L

Abstract:
1. A storage apparatus connected to a computer, comprising: (a) a plurality of storage devices for configuring a storage area; (b) a controller for controlling data read/write from/in the storage devices, (c) an encryption/decryption unit for encrypting or decrypting data stored in said logical volumes or update data stored in said common resource; and (d) a key change unit for changing a key for encrypting or decrypting data stored in said logical volumes, and changing a key for encrypting or decrypting update data stored in said common resource based on information of said key used for data stored in said logical volumes, wherein a first encryption key is set to the first partition, and a second encryption key is set to the second partition; wherein the encryption key for the second area is changed from the first encryption key to the second encryption key, and wherein the pre-update data stored in the second area is decoded using the first encryption key and then encrypted using the second encryption key.