Import control of content

• US 20060075424A1
• Filed: 01/23/2004
• Published: 04/06/2006
• Est. Priority Date: 02/10/2003
• Status: Abandoned Application

• Current Assignee: Koninklijke Philips Electronics N.V. (Koninklijke Philips N.V.)
• Original Assignee: Koninklijke Philips Electronics N.V. (Koninklijke Philips N.V.)
• Inventors: Talstra, Johan Cornelis, Maes, Maurice Jerome Justin Jean-Baptiste, Lokhoff, Gerardus Cornelis Petrus
• Application Number:
  US10/544,827
• Publication Number:
  US 20060075424A1
• Time in Patent Office: Days
• US Class Current: 725/25
• CPC Class Codes: H04L 12/2803 Home automation networks
• CPC Class Codes: H04L 2012/2849 Audio/video appliances
• CPC Class Codes: H04L 63/0428 wherein the data content is protected, e.g. by encrypting or encapsulating the payload
• CPC Class Codes: H04L 63/12 Applying verification of the received information cryptographic mechanisms or cryptographic arrangements for data integrity or data verification H04L9/32
• CPC Class Codes: H04L 67/04 specially adapted for terminals or networks with limited capabilities; specially adapted for terminal portability
• CPC Class Codes: H04L 67/06 specially adapted for file transfer, e.g. file transfer protocol [FTP]
• CPC Class Codes: H04N 2005/91335 the copy protection signal being a watermark
• CPC Class Codes: H04N 21/44008 involving operations for analysing video streams, e.g. detecting features or characteristics in the video stream arrangements characterised by components specially adapted for monitoring, identification or recognition of video in broadcast systems H04H60/59
• 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 21/8358 involving watermark protecting executable software by watermarking G06F21/16; image watermarking in general G06T1/0021; watermarks inserted in still images for transmission purposes H04N1/32144; inserting watermarks during video coding H04N19/467
• CPC Class Codes: H04N 5/913 for scrambling ; for copy protection

Abstract

A method of and device for controlling import of content into a domain comprising a number of devices. The method comprises checking for the presence of a domain watermark in the content, and if the domain watermark is found in the content, refusing import of the content into the domain, and if the domain watermark is not found in the content, allowing import of the content into the domain and causing the domain watermark to be embedded into the content. Optionally, re-importing into the “original” domain might be allowed. In this embodiment the method further comprises refusing import of the content into the domain if the domain watermark is found in the content unless the identifier matches an identifier for the domain. Other payloads in the domain watermark can be used to e.g. implement location- or time-based restrictions on import.

Claims

1. A method of controlling import of content into a domain comprising a number of devices, comprising checking for the presence of a domain watermark in the content, and

if the domain watermark is found in the content, refusing import of the content into the domain,

if the domain watermark is not found in the content, allowing import of the content into the domain and causing the domain watermark to be embedded into the content.

2. The method of claim 1, in which the domain watermark is embedded into the content when the content is being imported into the domain.

3. The method of claim 1, in which the domain watermark is embedded into the content when the content is being exported from the domain.

4. The method of claim 1, in which the domain watermark contains an identifier of one or more domains.

5. The method of claim 4, comprising refusing import of the content into the domain if the domain watermark is found in the content unless the identifier matches an identifier for the domain.

6. The method of claim 1, in which the domain watermark contains location information such as a time zone or a region of the world, the method further comprising refusing import of the content into the domain if a location of at least one device in the domain does not match the location information.

7. The method of claim 1, comprising checking for the presence of the domain watermark in the content only if the content comprises a broadcast flag.

8. The method of claim 1, comprising checking for the presence of the domain watermark in the content only if the content comprises a broadcast flag and is not in encrypted form.

9. The method of claim 1, comprising checking for the presence of the domain watermark in the content only if the content comprises a particular further watermark.

10. The method of claim 1, comprising computing a robust hash and checking for the presence of the domain watermark in the content only if the computed robust hash occurs on a list comprising one or more robust hashes of content to be checked for the presence of the domain watermark.

11. The method of claim 1, in which the watermark contains timing information, the method further comprising refusing import of the content into the domain if a current time does not match the timing information.

12. The method of claim 1, comprising allowing import of the content into the domain only if a license comprising a robust hash of the content is available.

13. A device for controlling import of content into a domain comprising a number of devices, comprising

a watermark detector for checking for the presence of a domain watermark in the content, coupled to an import control module,

the import control module being arranged for,

if the domain watermark is found in the content, refusing import of the content into the domain, and

if the domain watermark is not found in the content, allowing import of the content into the domain and causing the domain watermark to be embedded into the content.

14. The device of claim 13, further comprising a watermarking module for embedding the domain watermark into the content.