Supercharge Your Innovation With Domain-Expert AI Agents!

Content protection method, and information recording and reproduction apparatus using the same

A content and content key technology, which is applied in digital recording/reproduction, program/content distribution protection, secure communication devices, etc., can solve problems such as content editing cannot be realized, and achieve the effect of preventing copying and preventing content copying

Inactive Publication Date: 2006-09-13
PANASONIC CORP
View PDF0 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Thus, editing of content cannot be achieved, such as content being assembled from multiple discs into a single disc

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Content protection method, and information recording and reproduction apparatus using the same
  • Content protection method, and information recording and reproduction apparatus using the same
  • Content protection method, and information recording and reproduction apparatus using the same

Examples

Experimental program
Comparison scheme
Effect test

no. 3 example

[0036] refer to figure 2 , a media ID 31 uniquely assigned to each medium and a media key block (MKB) 32 , which is uniquely assigned to each medium, are written in an area other than the user area as rewrite prohibition information in advance, and the media key block (MKB) 32 32 is used as device key invalid information. An encrypted state key 36 is also stored outside the user area, where the encrypted state key 36 is associated with Figure 6 and Figure 7 The encrypted state keys in 73 and 93 correspond. Encrypted title key invalidation information 33 is stored in a write area within the user area, and a title key 34 corresponding to stored content 35 is stored as content management information. The driver 40 has a device key 41 , and the content reproduction device, such as software 43 in a personal computer (PC), also has a device key 44 . Operation blocks 40, 45, and 46 correspond to figure 1 Operation blocks 22, 25 and 26 in .

[0037] First, the software 43 an...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

In content protection method and apparatus, a title key invalidation information is generated for invalidating a title key corresponding to a content in a medium and a content key is generated from the title key and the title key invalidation information. The content is encrypted based on the content key. The title key invalidation information is changed in case of removing or moving the content from the medium and the changed title key invalidation information is stored in the medium. Therefore, the content is prevented from being replicated while enabling the content to be reproduced in another medium.

Description

technical field [0001] The present invention relates to a content protection method for copyright protection and recording various digital contents such as video data and audio data on a recording medium, and an information recording and reproducing apparatus using the method. Background technique [0002] In rewritable optical discs such as DVD-RAM or DVD-RW, by using the title key assigned to the title, the unique media ID assigned to each disc, the device key assigned to the drive and reproduction device, and the media Key block (media key block: MKB) to protect the copyright of the content recorded in the disc, where MKB is used as device key invalidation information, which is placed outside the user area (or user data area) of the disc Set the rewrite prohibition (import) area. [0003] In this scheme, a device key, a media ID, or a title key, which is key processing with MKB, is used to encrypt the content. Thus, even when the encrypted content is illegally copied to...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G11B20/10G06F12/14H04L9/00H04N5/91H04N7/167G06F21/10G06F21/60G06F21/62
CPCG06F21/10G11B20/10
Inventor 中村良光富永喜代司
Owner PANASONIC CORP
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More