License server and user processor

• US 20070011097A1
• Filed: 07/06/2005
• Published: 01/11/2007
• Est. Priority Date: 07/06/2005
• Status: Abandoned Application

• Current Assignee: Nero AG
• Original Assignee: Nero AG
• Inventors: Eckleder, Andreas
• Application Number:
  US11/177,650
• Publication Number:
  US 20070011097A1
• Time in Patent Office: Days
• US Class Current: 705/59
• 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: G06F 2221/2135 Metering
• CPC Class Codes: G06F 2221/2137 Time limited access, e.g. to a computer or data
• CPC Class Codes: H04L 2463/062 applying encryption of the keys cryptographic mechanisms or cryptographic arrangements for key distribution using key encryption key H04L9/0822
• CPC Class Codes: H04L 63/0428 wherein the data content is protected, e.g. by encrypting or encapsulating the payload

Abstract

A license server for granting licenses in response to a user request receives a content identifier from a user identifying a content having associated therewith a user key necessary for decrypting an encrypted version of the content. Furthermore, a license terms provider for providing license terms in response to the content identifier is present. The license terms are independent of an identification of the user and restrict the use of the content. An output interface provides the license terms and the encrypted version of the content key to the user.

Claims

1. License server for granting licenses in response to a user request, comprising:

a receiver for receiving a content identifier from a user identifying a content having associated therewith a content key necessary for decrypting an encrypted version of the content;

a license terms provider for providing license terms, the license terms provider being operative

to check, in response to the content identifier, an availability for the first license terms based on a condition, wherein the condition depends on a global variable, the global variable being independent of the user, and wherein the first license terms are independent of an identification of the user, restrict a use of the content and are available without payment from the user,

to provide the first license terms, when an availability for the first license terms has been confirmed;

a controller adapted for offering second license terms, when a non-availability of the first license terms is determined by the license terms provider, the second license terms being available against payment of a license fee; and

an output interface adapted for outputting a license having the first license terms and an encrypted version of the content key, when the availability of the first license terms has been confirmed by the license provider, and

for outputting a license having the second license terms and the encrypted version of the content key, when the license fee has been paid or when the user has provider personal data for an electronic money transfer.

4. License server in accordance with claim 1,

in which the license terms provider is operative:

to hold a value of a global variable,

to change the value, when a license having the first license terms is granted, and

to check the availability for the first license terms by comparing the value to a threshold value and by deciding the availability based on the result of comparing.

6. License server in accordance with claim 1, in which the license term provider is adapted such that the global variable depends on a state of the license server.

7. License server in accordance with claim 1, in which the state of the license server includes a time of a clock of the license server, a number of already granted licenses having the first license terms for the content or for a group of contents, or a value indicating a number of user requests in a specified time period.

8. License server in accordance with claim 1, in which the content identifier is plaintext, and is included in a file or stored as a meta-data entry of a file, the file including the encrypted version of the content.

9. License server in accordance with claim 1, in which the receiver is operative to receive an indication on a region, in which the user resides, and

in which the output interface is operative to output the license terms and the encrypted version of the content key together with an explanation, the explanation being in a language determined by the region, in which the user resides.

2. (canceled)

3. (canceled)

5. (canceled)

10. Method of granting licenses in response to a user request, comprising:

receiving a content identifier from a user identifying a content having associated therewith a content key necessary for decrypting an encrypted version of the content;

providing license term the step of providing including the steps of;

checking, in response to the content identifier, an availability for first license terms based on a condition, wherein the condition depends on a global variable, the global variable being independent of the user, wherein the first license terms is independent of an identification of the user, restrict a use of the content, and are available without payment from the user,; and

offering second license terms, when a non-availability of the first license terms is determined in the step of checking, the second license terms being available against payment of a license fee; and

when the availability of the first license terms has been confirmed,

outputting a license having the first license terms and an encrypted version of the content key, and when the license fee has been paid or when the user has Provided personal data for an electronic money transfer, outputting a license having the second license terms and the encrypted version of the content key.

11-14. -14. (canceled)

15. Computer program for performing, when running on a computer, a method of granting licenses in response to a user request, comprising:

receiving a content identifier from a user identifying a content having associated therewith a content key necessary for decrypting an encrypted version of the content;

providing license terms the step of providing including the steps of;

checking, in response to the content identifier, an availability for first license terms based on a condition, wherein the condition depends on a global variable being independent of the user, wherein the first license terms is independent of an identification of the user, restrict a use of the content, and are available without payment from the user,

providing the first license terms, when an availability for the first license terms has been confirmed; and

offering second license terms, when a non-availability of the first license terms is determined in the step of checking, the second license terms being available against payment of a license fee; and

when the availability of the first license terms has been confirmed, outputting a license having the first license terms and an encrypted version of the content key, and

when the license fee has been paid or when the user has provided personal data for an electronic money transfer, outputting a license having the second license terms and the encrypted version of the content key.

16. (canceled)