Data processing apparatus, data processing method, terminal unit, and transmission method of data processing apparatus

• US 8,607,069 B2
• Filed: 06/04/2004
• Issued: 12/10/2013
• Est. Priority Date: 03/03/1999
• Status: Expired due to Fees

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Kihara, Nobuyuki, Yokota, Teppei
• Primary Examiner(s): Shin, Kyung H
• Application Number:
  US10/861,212
• Publication Number:
  US 20040218214A1
• Time in Patent Office: 3,476 Days
• Field of Search: 713/193, 705/1, 358/1.16, 380277-279, 380281-285
• US Class Current: 713/193
• CPC Class Codes: G06F 16/10 File systems; File servers
• CPC Class Codes: G06F 21/10 Protecting distributed programs or content, e.g. vending or licensing of copyrighted material protection in video systems or pay television H04N7/16 ; Digital rights management [DRM]
• CPC Class Codes: G06F 21/16 Program or content traceability, e.g. by watermarking
• CPC Class Codes: G06F 21/31 User authentication
• CPC Class Codes: G06F 21/445 by mutual authentication, e.g. between devices or programs
• CPC Class Codes: G06F 21/602 Providing cryptographic facilities or services
• CPC Class Codes: G06F 21/72 in cryptographic circuits
• CPC Class Codes: G06F 21/78 to assure secure storage of data address-based protection against unauthorised use of memory G06F12/14; record carriers for use with machines and with at least a part designed to carry digital markings G06K19/00
• CPC Class Codes: G06F 21/79 in semiconductor storage media, e.g. directly-addressable memories
• CPC Class Codes: G06F 2221/2107 File encryption
• CPC Class Codes: G06F 2221/2137 Time limited access, e.g. to a computer or data
• CPC Class Codes: G11B 20/00086 Circuits for prevention of unauthorised reproduction or copying, e.g. piracy indicating unauthorised use of record carriers in general G11B23/28; scrambling for television signal recording H04N5/913; network architectures or network protocols for network security H04L63/00; cryptographic mechanisms or cryptographic arrangements for secret or secure communication H04L9/00
• CPC Class Codes: G11B 20/00181 using a content identifier, e.g. an international standard recording code [ISRC] or a digital object identifier [DOI]
• CPC Class Codes: G11B 20/00195 using a device identifier associated with the player or recorder, e.g. serial numbers of playback apparatuses or MAC addresses
• CPC Class Codes: G11B 20/0021 involving encryption or decryption of contents recorded on or reproduced from a record carrier
• CPC Class Codes: G11B 20/00246 wherein the key is obtained from a local device, e.g. device key initially stored by the player or by the recorder
• CPC Class Codes: G11B 20/00297 the key being stored in a management area, e.g. the video manager [VMG] of a DVD
• CPC Class Codes: G11B 20/00478 wherein contents are decrypted and re-encrypted with a different key when being copied from/to a record carrier
• CPC Class Codes: G11B 20/00492 wherein content or user data is encrypted
• CPC Class Codes: G11B 20/00507 wherein consecutive physical data units of the record carrier are encrypted with separate encryption keys, e.g. the key changes on a cluster or sector basis
• CPC Class Codes: G11B 20/00753 : wherein the usage restriction limits the number of copies that can be made, e.g. CGMS, SCMS, or CCI flags
• CPC Class Codes: G11B 20/10 : Digital recording or reproducing
• CPC Class Codes: G11C 16/20 : Initialising; Data preset; Chip identification
• CPC Class Codes: G11C 16/22 : Safety or protection circuits preventing unauthorised or accidental access to memory cells
• CPC Class Codes: G11C 2207/16 : Solid state audio deprecated, only for historical reasons, G06F3/16, G11B
• CPC Class Codes: G11C 7/16 : Storage of analogue signals in digital stores using an arrangement comprising analogue/digital [A/D] converters, digital memories and digital/analogue [D/A] converters

Abstract

A data processing apparatus is disclosed, that comprises a large capacity memory means for storing a plurality of files, a memory means for storing move/copy history when a particular file is moved/copied from the large capacity memory means to a non-volatile memory, a reference means for referencing the history information stored in the memory means when the particular file is moved/copied from the large capacity memory means to the non-volatile memory, and a control means for prohibiting the particular file from being moved/copied from the large capacity memory means to the non-volatile memory when the reference means has detected that the history information is stored in the memory means.

Claims

1. A data processing apparatus comprising an attachable/detachable non-volatile recording medium and a host for receiving/transmitting encrypted contents data from/to the attachable/detachable non-volatile recording medium,

wherein the attachable/detachable non-volatile recording medium comprises:

an interface for receiving from the host contents data encrypted with a first key by first encrypting means at the host, and the first key encrypted with a second key;

decrypting means for decrypting the encrypted first key with the second key;

second encrypting means for re-encrypting the decrypted first key with a third key, the third key stored in the attachable/detachable non-volatile recording medium;

storage means for storing, in the attachable/detachable non-volatile recording medium, the first key re-encrypted with the third key and the contents data encrypted with the first key;

receiving means for receiving, from the storage means, the first key re-encrypted with the third key; and

decrypting means for decrypting, with the third key, the first key re-encrypted with the third key, and

wherein the host comprises;

encrypting means for re-encrypting the decrypted first key with a fourth key that is different from the third key; and

storing means for storing the contents data encrypted with the first key and the first key re-encrypted with the fourth key.

2. The data processing apparatus as set forth in claim 1, wherein the contents data has been compressed corresponding to a predetermined compressing method.

3. The data processing apparatus as set forth in claim 1, wherein the attachable/detachable non-volatile recording medium includes a management area that includes a contents cumulation number corresponding to each data unit of the contents data.

4. The data processing apparatus as set forth in claim 1, wherein the attachable/detachable non-volatile recording medium includes a management area that includes a number unique to the second encrypting means.

5. The data processing apparatus as set forth in claim 1, wherein the attachable/detachable non-volatile recording medium includes a management area that includes a file number assigned to each data unit of the contents data.

6. The data processing apparatus as set forth in claim 1, wherein the first key is created for each data unit of the contents data.

7. The data processing apparatus as set forth in claim 1, wherein the attachable/detachable non-volatile recording medium includes a flash memory.

8. The data processing apparatus as set forth in claim 1, wherein the host further comprises:

input means for inputting linear digital contents data;

compression process means for compressing the linear digital contents data; and

encrypting means for encrypting compressed linear digital contents data with the first key and encrypting the first key with the second key.

9. A method of transmitting data between an attachable/detachable non-volatile recording medium and a host to which the attachable/detachable non-volatile recording medium connects, the method comprising:

encrypting, at the host, contents data with a first key;

encrypting, at the host, the first key with a second key;

decrypting, at the attachable/detachable non-volatile recording medium, the encrypted first key with the second key;

re-encrypting, at the attachable/detachable non-volatile recording medium, the decrypted first key with a third key;

outputting, to the host, the first key re-encrypted with the third key and the contents data encrypted with the first key;

receiving, at the host, the first key re-encrypted with the third key and the contents data encrypted with the first key;

decrypting, with the third key at the host, the first key re-encrypted with the third key;

re-encrypting, at the host, the decrypted first key with a fourth key stored in the host; and

storing, at the host, the contents data encrypted with the first key and the first key re-encrypted with the fourth key.