Method and apparatus for importing content

• US 20070156599A1
• Filed: 09/18/2006
• Published: 07/05/2007
• Est. Priority Date: 01/03/2006
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Kim, Bong-seon, Nam, Su-hyun, Yoon, Young-sun
• Granted Patent: US 7,983,989 B2
• Time in Patent Office: Days
• US Class Current: 705/52
• CPC Class Codes: G06F 21/10 Protecting distributed programs or content, e.g. vending or licensing of copyrighted material protection in video systems or pay television H04N7/16 ; Digital rights management [DRM]
• 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 21/4367 Establishing a secure communication between the client and a peripheral device or smart card
• CPC Class Codes: H04N 21/4627 Rights management associated to the content security in data switching network management H04L41/28; security management or policies for network security H04L63/20; access security in wireless networks H04W12/08
• CPC Class Codes: H04N 21/8355 involving usage data, e.g. number of copies or viewings allowed
• 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

A method and apparatus for protecting digital content in a digital rights management (DRM) system are provided. The method includes: determining a usage rule for content included in a first content file based on usage constraint information included in the first content file; and generating a second content file complying with this usage rule. According to the method and apparatus, the security requirement of content creators and content providers can be satisfied and at the same time the requirement of content consumers for freer usage can be satisfied.

Claims

1. A method of importing a first content file into a second content file, the method comprising:

determining a usage rule for content included in the first content file based on usage constraint information included in the first content file; and

generating the second content file complying with the determined usage rule.

2. The method of claim 1, wherein the information is usage constraint information of the content and in the determining of the usage rule the usage rule is determined based on the usage constraint information.

3. The method of claim 2, wherein the usage constraint information is information restricting the number of times of copying the content.

4. The method of claim 2, wherein the usage constraint information is information indicating whether or not unrestricted redistribution of the content is prohibited.

5. The method of claim 1, further comprising encrypting selectively the content based on the information, wherein in the generation of the second content file, the second content file including the usage rule and the encrypted content is generated.

6. The method of claim 1, further comprising determining the usage bind of the content based on the information, wherein in the determining of the usage rule, the usage rule is determined with respect to each determined usage bind.

7. The method of claim 6, wherein in the determining of the usage bind of the content, the usage bind of the content is determined to be a device-bound that limits the usage to any one device or a domain-bound that limits the usage to all devices included in any one domain,

and in the determining of the usage rule, if the usage bind is determined to be a device-bound, the usage rule of the content in any one device is determined, and if the usage bind is determined to be a domain-bound, the usage rule of the content in any one domain is determined.

8. The method of claim 6, further comprising:

encrypting a content key with an encryption key corresponding to the determined usage bind; and

encrypting the content with the content key,

wherein in the generating of the second content file, the content file including the usage rule, the encrypted content key and the encrypted content is generated.

9. The method of claim 1, further comprising generating and issuing a license of the content including the determined usage rule, wherein in the generating of the second content file, the second content file including the issued license is generated.

10. The method of claim 9, further comprising measuring the time to issue the license,

wherein in the generating and issuing of the license of the content, the license further including the measured time is generated and issued.

11. The method of claim 1, further comprising:

electronically signing the determined usage rule; and

generating and issuing a license of the content including the electronically signed usage rule,

wherein in the generating of the second content file, the second content file including the issued license is generated.

12. The method of claim 1, wherein the first content file does not comply with the rule of a predetermined digital rights management (DRM) system and the second content file complies with the rule of the DRM system.

13. An apparatus of importing a first content file as a second content file, the apparatus comprising:

a usage rule determination unit determining a usage rule for content included in the first content file based on usage constraint information included in the first content file; and

a content file generation unit generating the second content file complying with the determined usage rule.

14. The apparatus of claim 13, wherein the information is usage constraint information of the content and the usage rule determination unit determines the usage rule based on the usage constraint information.

15. The apparatus of claim 13, further comprising an encryption unit encrypting selectively the content based on the information, wherein the content file generation unit generates the second content file including the usage rule and the encrypted content.

16. The apparatus of claim 13, further comprising a usage bind determination unit determining the usage bind of the content based on the information, wherein the usage rule determination unit determines the usage rule with respect to each determined usage bind.

17. The apparatus of claim 13, further comprising a license issuance unit generating and issuing a license of the content including the determined usage rule, wherein the content file generation unit generates the second content file including the issued license.

18. A computer readable recording medium having embodied thereon a computer program for executing a method of importing a first content file into a second content file, wherein the method comprises:

determining a usage rule for content included in the first content file based on usage constraint information included in the first content file; and

generating the second content file complying with the determined usage rule.

19. A method of importing content comprising:

assigning an identification (ID) of the content;

generating a content key corresponding to the ID;

generating a license including usage rule information determined by usage constraint information of the content; and

encrypting the content with the content key.

20. The method of claim 19, wherein the license further comprises information on a time when the license is issued.

21. A method of importing content in a device-bound, the method comprising:

assigning an ID of the content;

generating a content key corresponding to the ID;

generating a license including usage rule information determined by usage constraint information of the content;

encrypting the content with the content key; and

setting a license status to use the content to an apparatus for importing the content.

22. A method of importing content in a device-bound, the method comprising:

assigning an ID of the content;

generating a content key corresponding to the ID;

generating a license including usage rule information determined by usage constraint information of the content;

encrypting the content with the content key; and

setting a license status to use the content to a device which receives the generated license and the encrypted content.

23. A method of importing content in a domain-bound, the method comprising:

assigning an ID of the content;

generating a content key corresponding to the ID;

generating a license including usage rule information determined by usage constraint information of the content;

encrypting the content with the content key;

receiving a domain key of the domain; and

encrypting the content key with the domain key.