Equipment for digital video disc processing information on digital video disc using prescribed information serving as key, and method and apparatus for recording prescribed information

• US 20040190860A1
• Filed: 03/26/2004
• Published: 09/30/2004
• Est. Priority Date: 03/31/2003
• Status: Abandoned Application

• Current Assignee: Funai Electric Co., Ltd.
• Original Assignee: Funai Electric Co., Ltd.
• Inventors: Ishiguchi, Fusao
• Application Number:
  US10/811,421
• Publication Number:
  US 20040190860A1
• Time in Patent Office: Days
• US Class Current: 386/259
• 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: H04N 2005/91364 the video signal being scrambled
• 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 21/42692 for reading from or writing on a volatile storage medium, e.g. Random Access Memory [RAM]
• CPC Class Codes: H04N 21/4325 by playing back content from the storage medium reproduction of recorded television signals H04N5/76; reproduction of recorded television signals H04N9/79
• CPC Class Codes: H04N 21/433 Content storage operation, e.g. storage operation in response to a pause request, caching operations
• CPC Class Codes: H04N 21/4405 involving video stream decryption
• CPC Class Codes: H04N 5/913 for scrambling ; for copy protection

Abstract

Equipment for DVD includes a flash memory in which key data associated with information on a DVD is recorded in advance, and accesses the information on the DVD using the key data read from the flash memory. The key data is recorded in advance in a specific area of the flash memory, and random data is written in advance around the key data. The key data refers to an encryption key for equipment for encrypting and recording information on the DVD or a decryption key for equipment for decrypting the information read from the DVD. Such a key is recorded, buried in the random data.

Claims

1. Equipment for a digital video disc, comprising:

a memory in which key data associated with information on a digital video disc is recorded in advance; and

means for processing the information on said digital video disc using said key data read from said memory;

wherein

random data is written around said key data in said memory.

2. The equipment for a digital video disc according to claim 1, wherein

said key data is an encryption key for equipment for encrypting and recording the information on said digital video disc.

3. The equipment for a digital video disc according to claim 2, wherein

said key data is a decryption key for equipment for decrypting the information read from said digital video disc.

4. The equipment for a digital video disc according to claim 1, wherein

said key data is a decryption key for equipment for decrypting the information read from said digital video disc.

5. A method of recording in advance prescribed information to be protected against unauthorized access in a memory, comprising the steps of:

writing said prescribed information in an unused area of said memory; and

writing random data in an area within said unused area adjacent to said prescribed information written in said step of writing.

6. The method of recording prescribed information according to claim 5, wherein

said memory is mounted on equipment for a digital video disc, and

said prescribed information is key data associated with information on a digital video disc.

7. The method of recording prescribed information according to claim 5, wherein

said prescribed information is a password.

8. An apparatus for recording in advance prescribed information to be protected against unauthorized access in a memory, comprising:

means for writing said prescribed information in an unused area of said memory; and

means for writing random data in an area within said unused area adjacent to said prescribed information written in said step of writing.