Patent ID: 6792539
Filing Date: 2004-09-14
Classification: G06F,G11B,G11C

Abstract:
A data processing method for encrypting/decrypting digital data for transfer from a data processing apparatus to a storage device comprising the steps of:session encrypting a content key generated in said data processing apparatus by a session key; transmitting the session encrypted content key from said data processing apparatus to said storage device; session decrypting the session encrypted content key back into said content key in said storage device by said session key; storage encrypting said content key into a storage encrypted content key in said storage device by a storage use key; transmitting said storage encrypted content key from said storage device to said data processing apparatus; data encrypting said digital data in said data processing apparatus on the basis of said storage encrypted content key from said storage device; transmitting the encrypted digital data along with said storage encrypted content key from said data processing apparatus to said storage device; and storing the encrypted digital data and said storage encrypted content key in said storage device.