Patent ID: 9147087
Filing Date: 2015-09-29
Classification: G06F,H04L

Abstract:
1. A method of accessing a data storage device, the method comprising: transforming a first key to obtain a second key; assigning the second key to a logical unit of data of the data storage device; using the second key to read data from the data storage device or to write data to the data storage device; transforming a third key to obtain a fourth key; assigning the fourth key to the logical unit of data of the data storage device; determining whether the data storage device is a conventional data storage device of or a full disk encryption data storage device; and if it determined that the data storage device is a conventional data storage device, using the fourth key to encrypt and decrypt the data from the data storage device; wherein the first key is a replaceable key and the third key is a cryptographic key which remains unchanged.