Reproducing apparatus, recording apparatus and display apparatus

• US 8,311,219 B2
• Filed: 11/30/2011
• Issued: 11/13/2012
• Est. Priority Date: 04/14/1998
• Status: Expired due to Fees

• Current Assignee: Hitachi Consumer Electronics Company Limited (Hitachi, Ltd.)
• Original Assignee: Hitachi, Ltd.
• Inventors: Kawamae, Osamu, Takeuchi, Toshifumi, Kimura, Hiroyuki, Arai, Takao, Yoshiura, Hiroshi
• Primary Examiner(s): Smithers, Matthew
• Application Number:
  US13/307,110
• Publication Number:
  US 20120134498A1
• Time in Patent Office: 349 Days
• Field of Search: 380/287, 380/201, 705/57
• US Class Current: 380/201
• 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 20/00188 involving measures which result in a restriction to authorised devices recording or reproducing contents to/from a record carrier
• 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 20/00224 wherein the key is obtained from a remote server
• CPC Class Codes: G11B 20/00304 the key being stored in the lead-in area [LIA]
• CPC Class Codes: G11B 20/00449 content scrambling system [CSS]
• CPC Class Codes: G11B 20/00739 wherein the usage restriction is associated with a specific geographical region
• 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 20/00768 wherein copy control information is used, e.g. for indicating whether a content may be copied freely, no more, once, or never, by setting CGMS, SCMS, or CCI flags
• CPC Class Codes: G11B 20/00884 involving a watermark, i.e. a barely perceptible transformation of the original data which can nevertheless be recognised by an algorithm
• CPC Class Codes: H04K 1/00 Secret communication
• CPC Class Codes: H04L 2209/603 Digital right managament [DRM]
• CPC Class Codes: H04L 9/32 including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials
• CPC Class Codes: H04N 2005/91328 the copy protection signal being a copy management signal, e.g. a copy generation management signal [CGMS]
• CPC Class Codes: H04N 2005/91335 the copy protection signal being a watermark
• CPC Class Codes: H04N 2005/91364 the video signal being scrambled
• CPC Class Codes: H04N 21/4367 Establishing a secure communication between the client and a peripheral device or smart card
• CPC Class Codes: H04N 21/4405 involving video stream decryption
• CPC Class Codes: H04N 5/765 Interface circuits between an apparatus for recording and another apparatus
• CPC Class Codes: H04N 5/77 : between a recording apparatus and a television camera
• CPC Class Codes: H04N 5/775 : between a recording apparatus and a television receiver
• CPC Class Codes: H04N 5/781 : on disks or drums
• CPC Class Codes: H04N 5/85 : on discs or drums
• CPC Class Codes: H04N 5/913 : for scrambling ; for copy protection
• CPC Class Codes: H04N 9/8042 : involving data reduction

Abstract

An authentication method for use in sending/receiving data between a coded data output apparatus for outputting coded data having a water mark, and a recording apparatus for recording data onto a recording medium, the method including: deciding a type of the recording medium used by the recording apparatus; based on a result of the deciding, selecting, from a plurality of authentication methods, an authentication method corresponding to the type of the recording medium, and conducting authentication between the coded data output apparatus and the recording apparatus, using the authentication method; sending/receiving data between the coded data output apparatus and the recording apparatus after conducting the authentication; and in a case where the coded data has the water mark, detecting the water mark by the coded data output apparatus, wherein the data exchanged between the coded data output apparatus and the recording apparatus is scrambled by a scrambling method corresponding to the type the recording medium.

Claims

1. An authenticating method for a recording apparatus capable of recording, onto a plurality of recording mediums of different types, scrambled data as is that is outputted from a data output apparatus,

wherein said recording apparatus is configured to be capable of handling a plurality of scrambling methods of different types corresponding to said plurality of recording mediums of different types,

said plurality of scrambling methods of different types each include an authenticating method for conducting authentication between said recording apparatus and said data output apparatus,

said authenticating method comprising:

selecting, from said plurality of scrambling methods of different types, a predetermined scrambling method; and

conducting authentication with said data output apparatus by an authenticating method which corresponds to said selected scrambling method, and sending/receiving information about the scrambling to/from said data output apparatus.

2. The authenticating method according to claim 1, wherein said selecting, from said plurality of scrambling methods of different types, a predetermined scrambling method, is conducted based on said types of the recording medium.

3. The authenticating method according to claim 1, wherein said plurality of scrambling methods of different types include scrambling methods for conducting scrambling corresponding to copy control states of the data to be recorded onto said recording mediums.

4. An authenticating method for a reproducing apparatus capable of reproducing data that is recorded in a scrambled state in a plurality of recording mediums of different types and outputting the reproduced data to a decoding apparatus,

wherein said reproducing apparatus is configured to handle a plurality of scrambling methods of different types corresponding to said plurality of recording mediums of different types,

said plurality of scrambling methods of different types each include an authenticating method for conducting authentication between said reproducing apparatus and said decoding apparatus,

said authenticating method comprising:

selecting, from said plurality of scrambling methods of different types, a predetermined scrambling method; and

conducting authentication with said decoding apparatus by an authenticating method which corresponds to said selected scrambling method, and sending/receiving information about the scrambling to/from said decoding apparatus.

5. The authenticating method according to claim 4, wherein said step of selecting, from said plurality of scrambling methods of different types, a predetermined scrambling method, is conducted based on said types of the recording medium.

6. The authenticating method according to claim 4, wherein said plurality of scrambling methods of different types include scrambling methods for carrying out scrambling corresponding to copy control states of the data to be recorded onto said recording mediums.

7. A recording apparatus capable of recording, onto a plurality of recording mediums of different types, scrambled data as is that is outputted from a data output apparatus, comprising:

authenticating units that conduct authentication with said data output apparatus; and

a recording unit that records the scrambled data as is onto the recording mediums,

wherein said recording apparatus is configured to be capable of handling a plurality of scrambling methods of different types corresponding to said plurality of recording mediums of different types,

said plurality of scrambling methods of different types each include an authenticating method for conducting authentication between said recording apparatus and said data output apparatus,

said authenticating units being configured to;

conduct authentication with said data output apparatus by an authenticating method which corresponds to a predetermined scrambling method which is selected from among said plurality of scrambling methods of different types, and send/receive information about the scrambling to/from said data output apparatus.

8. The recording apparatus according to claim 7, wherein said predetermined scrambling method is selected from said plurality of scrambling methods of different types based on said types of the recording medium.

9. The recording apparatus according to claim 7, wherein said plurality of scrambling methods of different types include scrambling methods for carrying out scrambling corresponding to copy control states of the data recorded in said recording mediums.

10. A reproducing apparatus capable of reproducing data that is recorded in a scrambled state in a plurality of recording mediums of different types and outputting the reproduced data to a decoding apparatus, comprising:

authenticating units which conduct authentication with said decoding apparatus; and

a data reproducing unit which reproduces data recorded in a scrambled state in said recording mediums,

wherein said reproducing apparatus is configured to handle a plurality of scrambling methods of different types corresponding to said plurality of recording mediums of different types,

said plurality of scrambling methods of different types each include an authenticating method for conducting authentication between said reproducing apparatus and said decoding apparatus,

said authenticating units are configured to conduct authentication with said decoding apparatus by an authenticating method which corresponds to the predetermined scrambling method selected from said plurality of scrambling methods of different types, and send/receive information about the decoding to/from said decoding apparatus.

11. The reproducing apparatus according to claim 10, wherein the predetermined scrambling method is selected from said plurality of scrambling methods of different types based on said types of the recording medium.

12. The reproducing apparatus according to claim 10, wherein said plurality of scrambling methods of different types include scrambling methods for conducting scrambling corresponding to copy control states of the data recorded on said recording mediums.