Data protection systems and methods

• US 7,770,031 B2
• Filed: 06/19/2008
• Issued: 08/03/2010
• Est. Priority Date: 08/31/1999
• Status: Expired due to Fees

• Current Assignee: PLS IV, LLC (Pretium Partners, LLC)
• Original Assignee: Intertrust Technologies Corporation (Fidelio Acquisition Co LLC)
• Inventors: Hunt, William, Sibert, W. Olin, Landsman, Richard A., Swenson, Eric J., MacKay, Michael K.
• Primary Examiner(s): CHEN, SHIN HON
• Application Number:
  US12/142,688
• Publication Number:
  US 20080276102A1
• Time in Patent Office: 775 Days
• Field of Search: 713/189, 713/193, 726/16, 726/17, 726/21, 726/26
• US Class Current: 713/193
• 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 21/1064 Restricting content processing at operating system level
• CPC Class Codes: G06F 21/16 Program or content traceability, e.g. by watermarking
• CPC Class Codes: G06F 21/55 Detecting local intrusion or implementing counter-measures
• CPC Class Codes: G06F 21/577 Assessing vulnerabilities and evaluating computer system security
• CPC Class Codes: G06F 21/6218 to a system of files or objects, e.g. local or distributed file system or database

Abstract

Systems and methods are provided for protecting electronic content from the time it is packaged through the time it is experienced by an end user. Protection against content misuse is accomplished using a combination of encryption, watermark screening, detection of invalid content processing software and hardware, and/or detection of invalid content flows. Encryption protects the secrecy of content while it is being transferred or stored. Watermark screening protects against the unauthorized use of content. Watermark screening is provided by invoking a filter module to examine content for the presence of a watermark before the content is delivered to output hardware or software. The filter module is operable to prevent delivery of the content to the output hardware or software if it detects a predefined protection mark. Invalid content processing software is detected by a monitoring mechanism that validates the software involved in processing protected electronic content. Invalid content flows can be detected by scanning the information passed across system interfaces for the attempted transfer of bit patterns that were released from an application and/or a piece of content management software.

Claims

1. A method for protecting electronic media content from unauthorized use, the method including:

receiving a request to access a piece of electronic media content;

monitoring at least one system interface for electronic data to be transferred to an output device, the monitoring including;

receiving at least a portion of the electronic data to be transferred to the output device;

generating a first identifier associated with the at least a portion of the electronic data;

comparing the first identifier with a second identifier; and

taking at least one predefined defensive action if the first identifier is related to the second identifier in a predefined manner, wherein the predefined defensive action is selected from the group consisting of;

modifying at least a portion of the electronic data, and

preventing the transfer of at least a portion of the electronic data to the output device via the system interface.

2. The method of claim 1, wherein the piece of electronic media content is encrypted, the method further including:

decrypting the piece of electronic media content.

3. The method of claim 1, in which the second identifier comprises a hash of at least a portion of the piece of electronic media content, and in which the first identifier comprises a hash of at least a portion of the electronic data to be transferred to the output device.

4. The method of claim 1, in which the second identifier comprises a predefined portion of the piece of electronic media content.

5. The method of claim 1, in which the system interface comprises a file system interface to one or more device drivers.

6. The method of claim 5, in which the one or more device drivers are selected from the group consisting of:

video display driver, sound driver, SCSI driver, IDE driver, network driver, video capture driver, floppy disk driver, and scanner driver.

7. The method of claim 1, in which the predefined defensive action comprises modifying at least a portion of the electronic data to be transferred to the output device.

8. The method of claim 7, in which modifying at least a portion of the electronic data to be transferred to the output device includes scrambling at least a portion of the electronic data.

9. The method of claim 1, in which the predefined defensive action comprises adding noise to at least a portion of the electronic data to be transferred to the output device.

10. The method of claim 1, in which the predefined defensive action comprises adding an electronic watermark or fingerprint to at least a portion of the electronic data to be transferred to the output device.

11. The method of claim 1, in which the predefined defensive action comprises preventing the transfer of at least a portion of the electronic data to an output device via the system interface.

12. The method of claim 1, in which the predefined relation between the first identifier and the second identifier comprises the first identifier being equal to the second identifier.

13. The method of claim 1, in which the at least one system interface is selected using rules associated with the piece of electronic media content, the rules being operable to identify certain system interfaces to which the piece of electronic media content is not allowed to be sent.

14. The method of claim 1, further including:

inserting a cryptographic fingerprint into the piece of electronic media content, the cryptographic fingerprint containing information relating to the request to access said piece of electronic media content.

15. The method of claim 14, in which inserting said cryptographic fingerprint into the piece of electronic media content includes:

authenticating a fingerprinting engine using a cryptographic credential; and

using the fingerprinting engine to insert the cryptographic fingerprint into the piece of electronic media content.

16. The method of claim 15, in which the fingerprinting engine is operable to authenticate a calling application using a cryptographic credential.