Protection of data on media recording disks

• US 7,031,470 B1
• Filed: 08/16/1999
• Issued: 04/18/2006
• Est. Priority Date: 01/22/1998
• Status: Expired due to Fees

• Current Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Original Assignee: NDS Limited (Cisco Systems, Inc.)
• Inventors: Bar-On, Gershon
• Primary Examiner(s): Sheikh, Ayaz
• Assistant Examiner(s): HOFFMAN, BRANDON S
• Application Number:
  US09/376,384
• Time in Patent Office: 2,437 Days
• Field of Search: 713/193, 705/57, 380/201, 380/203, 360/60
• US Class Current: 380/203
• CPC Class Codes: G06F 21/121 Restricting unauthorised execution of programs
• CPC Class Codes: G06F 21/123 by using dedicated hardware, e.g. dongles, smart cards, cryptographic processors, global positioning systems [GPS] devices
• CPC Class Codes: G06F 21/80 in storage media based on magnetic or optical technology, e.g. disks with sectors preventing unauthorised reproduction or copying of disc-type recordable media G11B20/00
• CPC Class Codes: G06F 2221/2121 Chip on media, e.g. a disk or tape with a chip embedded in its case
• 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 20/0021 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 20/00275 the key being stored on a chip attached to the record carrier
• CPC Class Codes: G11B 20/00876 wherein physical copy protection means are attached to the medium, e.g. holograms, sensors, or additional semiconductor circuitry
• CPC Class Codes: G11B 23/0042 with provision for auxiliary features sensing such features G11B17/00, G11B19/02
• CPC Class Codes: G11B 23/284 on the record carrier
• CPC Class Codes: H04N 2005/91364 the video signal being scrambled
• CPC Class Codes: H04N 21/26606 for generating or managing entitlement messages, e.g. Entitlement Control Message [ECM] or Entitlement Management Message [EMM] arrangements for conditional access to broadcast information or to broadcast-related services H04H60/14
• CPC Class Codes: H04N 21/26613 for generating or managing keys in general key distribution for secret or secure communication involving central third party, e.g. key distribution center [KDC] or trusted third party [TTP] H04L9/083; network support of key management H04L63/06; key management for network security in communication control or processing H04W12/04
• CPC Class Codes: H04N 21/4147 PVR [Personal Video Recorder] H04N5/76 takes precedence ; arrangements for broadcast with accumulation-type receivers H04H20/40
• CPC Class Codes: H04N 21/418 External card to be used in combination with the client device, e.g. for conditional access
• CPC Class Codes: H04N 21/42646 for reading from or writing on a non-volatile solid state storage medium, e.g. DVD, CD-ROM
• 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 21/4623 Processing of entitlement messages, e.g. ECM [Entitlement Control Message] or EMM [Entitlement Management Message] arrangements for conditional access to broadcast information or to broadcast-related services H04H60/14
• CPC Class Codes: H04N 5/913 : for scrambling ; for copy protection
• CPC Class Codes: H04N 7/1675 : Providing digital key or authorisation information for generation or regeneration of the scrambling sequence pseudo-random number generators in general G06F7/58

Abstract

This invention discloses a secure recording medium having at least one of audio, video and software content, comprising a plurality of media recording disks (DVD'"'"'s) with a disk security chip embedded in each the DVD, each the disk chip comprising a security key, wherein at least two of the DVD'"'"'s have different disk security keys.

A method for protecting access to content recorded on a media recording disk (DVD) is also disclosed.

Claims

1. A method for protecting access to content recorded on a media recording disk (DVD), comprising:

providing a disk security chip on the DVD, said disk security chip managing access to the content of the DVD;

providing a corresponding player security chip in a DVD player which is operative to play the DVD, said player security chip managing use of a data stream received from the DVD, said disk security chip being in wireless communication with said player security chip; and

providing said disk security chip with a disk key not known to a disk manufacturer,

wherein said disk security chip, after assuring that said DVD player is authentic, sends said DVD player said disk key.

2. The method according to claim 1 and comprising encrypting contents of said DVD with a content key.

3. The method according to claim 1 and comprising performing an authentication process between said disk security chip and said player security chip.

4. The method according to claim 3 and wherein said authentication process comprises a mutual zero-knowledge interaction authentication process.

5. The method according to claim 1 and wherein said disk security chip, after assuring that said DVD player is authentic, sends said DVD player said disk key encrypted with said player key.

6. The method according to claim 1 and wherein said player security chip verifies legitimacy of said disk key as a function of a geometric property of said DVD.

7. The method according to claim 6 and wherein said DVD is a multi-layer DVD and said geometric property is an angle between layers of said DVD.

8. A method for protecting access to content recorded on a media recording disk (DVD), comprising:

providing a disk security chip on the DVD, said disk security chip managing access to the content of the DVD; and

providing a corresponding player security chip in a DVD player which is operative to play the DVD, said player security chip managing use of a data stream received from the DVD, said disk security chip being in wireless communication with said player security chip,

wherein said disk security chip, after assuring that said DVD player is authentic, sends said DVD player a disk key.

9. The method according to claim 8 and comprising encrypting contents of said DVD with a content key.

10. The method according to claim 8 and comprising performing an authentication process between said disk security chip and said player security chip.

11. The method according to claim 10 and wherein said authentication process comprises a mutual zero-knowledge interaction authentication process.

12. The method according to claim 8 and wherein said disk security chip, after assuring that said DVD player is authentic, sends said DVD player said disk key encrypted with said player key.

13. The method according to claim 8 and wherein said player security chip verifies legitimacy of said disk key as a function of a geometric property of said DVD.

14. The method according to claim 13 and wherein said DVD is a multi-layer DVD and said geometric property is an angle between layers of said DVD.