Method and apparatus for controlling the reproduction of data stored on a storage medium method

• US 6,097,814 A
• Filed: 01/08/1998
• Issued: 08/01/2000
• Est. Priority Date: 01/10/1997
• Status: Expired due to Term

• Current Assignee: Rakuten, Inc. (Rakuten Group, Inc.)
• Original Assignee: Victor Company of Japan Limited (JVC Kenwood Corporation)
• Inventors: Mochizuki, Masaki
• Primary Examiner(s): Swann, Tod R.
• Assistant Examiner(s): Smithers, Matthew
• Application Number:
  US09/004,196
• Time in Patent Office: 936 Days
• Field of Search: 380/4, 380/44, 380/42, 380/3, 380/201, 705/51, 705/57, 705/59
• US Class Current: 380/44
• 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 20/00876 wherein physical copy protection means are attached to the medium, e.g. holograms, sensors, or additional semiconductor circuitry

Abstract

Plural program information and a BCA (Burst Cutting Area) number of the optical disc (100) is previously recorded in the optical disc (100). A drive ID is stored in the nonvolatile memory (104a) of the reproduction apparatus (104). A user of the reproduction appparatus (104) notifies the BCA number, the drive ID, and a number of preferred program information to the software house (software supplier(110) on the condition that the user pays for the reproduction of the preferred program information recorded in the optical disc (100). The software house (110) notifies a cipher key to the reproduction apparatus (104) or the user. A title key is calculated in the reproduction apparatus (104) in accordance with the BCA number, the drive ID, and the cipher key. The preferred information recorded in the optical disc (100) is permitted to be reproduced by using the title key.

Claims

1. A cipher key producing method comprising:

a step of reading a first proper information out from a recording medium wherein the first proper information is inherent to the recording medium and discriminates the recording medium recorded with program information from other recording mediums;

a step of reading out a second proper information inherent to a reproduction apparatus from a memory means of the reproduction apparatus wherein the second proper information discriminates the reproduction apparatus from other reproduction apparatuses for reading out the program information of the recording medium;

a step of reading out from the recording medium a specific information which specifies at least one preferred information of the program information; and

a step of producing at least one cipher key for reading out said one preferred program wherein the cipher key is produced through a calculation process according to a predetermined algorithm by using said first and second proper information and the specific information.

2. A cipher key producing method comprising:

a step of reading a proper information out from a recording medium wherein the proper information is inherent to the recording medium and discriminates the recording medium recorded with program information from other recording medium;

a step of reading out from the recording medium a specific information which specifies at least one preferred information of the program information; and

a step of producing at least one cipher key for reading out said one preferred information wherein the cipher key is produced through a calculation process according to a predetermined algorithm by using said proper information and the specific information.

3. A cipher key producing method comprising:

a step of reading a proper information out from a recording medium wherein the proper information is inherent to the recording medium and discriminates the recording medium recorded with program information from other recording mediums;

a step of reading out from the recording medium a specific information which specifies at least one preferred information of the program information; and

a step of producing at least one cipher key for reading out said one preferred information wherein the cipher key is produced through a calculation process according to a predetermined algorithm by using said proper information.

4. A cipher key producing method comprising:

a step of reading out a proper information inherent to a reproduction apparatus from a memory means of the reproduction apparatus wherein the proper information discriminates the reproduction apparatus from other reproduction apparatuses for reading out the program information of the recording medium;

a step of reading out from the recording medium a specific information which specifies at least one preferred information of the program information; and

a step of producing at least one cipher key for reading out said one preferred information wherein the cipher key is produced through a calculation process according to a predetermined algorithm by using said proper information and the specific information.

5. A cipher key producing method comprising:

a step of reading a proper information out from a recording medium wherein the proper information is inherent to the recording medium and discriminates the recording medium recorded with program information from other recording mediums;

a step of assigning a code number by a user;

a step of receiving the code number from the user; and

a step of producing at least one cipher key for reading a program information out from the recording medium wherein the cipher key is produced through a calculation process according to a predetermined algorithm by using said proper information and the code number.

6. A cipher key producing method comprising:

a step of reading a proper information out from a recording medium wherein the proper information is inherent to the recording medium and discriminates the recording medium recorded with program information from other recording mediums;

a step of assigning a code number by a user;

a step of receiving the code number from the user;

a step of reading out from the recording medium a specific information which specifies at least one preferred information of the program information assigned by the user; and

a step of producing a cipher key for reading out said one preferred information wherein the cipher key is produced through a calculation process according to a predetermined algorithm by using said proper information, and the code number, and the specific information.

7. A cipher key producing method, wherein the cipher key is recorded in other area than a main information area of an optical disc by a request of a user and utilized for reproducing main information comprising:

a step of assigning a discrimination sentence which is utilized for reproducing main information recorded in an optical disc by the user;

a step of selecting a specific information which specifies at least one preferred information of the main information by the user;

a step of transmitting said discrimination sentence and the specific information to a software house; and

a step of producing a cipher key for reading out said one preferred information wherein the cipher key is produced through a calculation process according to a predetermined algorithm by using said discrimination sentence and the specific information.