Patent ID: 6457126
Filing Date: 2002-09-24
Classification: G06F,G11B,G11C,H04L

Abstract:
A storage device, for storing data, comprising:a rewritable non-volatile memory (11) storing data; and controlling means (12) for accessing said non-volatile memory, and said storage device being characterized in that: a first encrypting key is stored in said non-volatile memory, a second encrypting key is stored in said controlling means and the first encrypting key is encrypted using the second encrypting key; and said controlling means includes key decrypting means (12) for decrypting the first encrypting key using the second encrypting key, writing means (12) for encrypting data using the first encrypting key decrypted by said key decrypting means, and writing the encrypted data in said non-volatile memory, and reading means (12) for reading out data from said non-volatile memory, and decrypting the read data using the first encrypting key which is decrypted by said key decrypting means.