Method and system for preventing unauthorized rerecording of multimedia content

• US 7,383,228 B2
• Filed: 08/11/2005
• Issued: 06/03/2008
• Est. Priority Date: 08/13/1998
• Status: Expired due to Fees

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Nusser, Stefan, Milsted, Kenneth L., Wilhelm, George W. Jr., Tantlinger, Bruce A., Lisanke, Michael G.
• Primary Examiner(s): Trammell; James P.
• Assistant Examiner(s): Badii; Behrang
• Application Number:
  US11/201,809
• Publication Number:
  US 20060085343A1
• Time in Patent Office: 1,027 Days
• Field of Search: 386/107, 386/104, 380/269, 705/51, 348/333.01
• US Class Current: 705/51
• CPC Class Codes: G06F 21/1013 to locations
• CPC Class Codes: G06F 2211/007 Encryption, En-/decode, En-/decipher, En-/decypher, Scramble, (De-)compress
• CPC Class Codes: G06F 2221/2107 File encryption
• CPC Class Codes: G06F 2221/2135 Metering
• CPC Class Codes: G06T 1/0021 Image watermarking
• CPC Class Codes: G06T 2201/0064 for copy protection or copy management, e.g. CGMS, copy only once, one-time copy
• CPC Class Codes: G11B 20/0021 involving encryption or decryption of contents recorded on or reproduced from a record carrier
• CPC Class Codes: G11B 20/00884 involving a watermark, i.e. a barely perceptible transformation of the original data which can nevertheless be recognised by an algorithm
• CPC Class Codes: H04L 2463/101 applying security measures for digital rights management data processing systems or methods, specially adapted for commerce, e.g. marketing, shopping, billing, auctions or e-commerce G06Q30/00
• CPC Class Codes: H04L 2463/102 applying security measure for e-commerce data processing systems or methods, specially adapted for e-commerce G06Q30/00
• CPC Class Codes: H04L 63/0428 wherein the data content is protected, e.g. by encrypting or encapsulating the payload
• CPC Class Codes: H04L 67/52 specially adapted for the location of the user terminal
• CPC Class Codes: H04L 69/04 Protocols for data compression, e.g. ROHC
• CPC Class Codes: H04L 69/329 in the application layer [OSI layer 7]
• CPC Class Codes: H04W 4/02 Services making use of location information

Abstract

A method, system and computer readable medium for the blocking of recording digital content at an end user multimedia end-user-system during the rendering of encrypted digital multimedia files. Before the process of rendering of encrypted digital multimedia can be started all rendered media stream during playback are opened to ensure that this multimedia content is not recorded. This blocks the usage of the multimedia interfaces including devices and/or ports that can be used to store un-encrypted content that has been decrypted for the purposes of playing or rendering. The method also includes an exception, which allows recording with permission from the present invention.

Claims

1. An end-user system comprising:

an interface to a storage media for storing encrypted multimedia content to be rendered using the end-user system using multimedia output devices and/or output ports of the end-user device after decryption of the encrypted multimedia content;

a plurality of multimedia input devices and/or input ports, wherein at least one of the multimedia input devices and/or input ports is capable of recording at least part of the encrypted multimedia content which has been decrypted; and

a multimedia player for rendering the encrypted digital content, whereby prior to decryption of the encrypted multimedia content, blocking access to all multimedia input devices and/or input ports of the end-user system, the blocking being accomplished by opening all multimedia input devices and/or input ports of the end-user system that can receive any part of the encrypted multimedia content which has been decryrted, to prevent use of such multimedia input devices and/or input ports, thereby preventing re-recording of any part of the encrypted multimedia content which has been decrypted by the end-user device;

decrypting at least part of the encrypted multimedia content; and

subsequent to decryption, and while access to all such multimedia input devices and/or input ports is blocked, rendering the at least part of the multimedia content which has been decrypted.

2. The end-user system according to claim 1, wherein the each of the multimedia input devices and/or input ports of the end-user system is independently opened.

3. The end-user system according to claim 1, wherein the each of the multimedia input devices and/or input ports of the end-user system are independently closed.

4. The end-user system according to claim 1, further comprising:

means for determining a recording quality for each of the multimedia input devices and/or input ports of the end-user system and in response to the recording quality being below a given quality level then not opening each of the multimedia input devices and/or input ports of the end-user system that are being below the given quality level prior to rendering of the encrypted digital content.

5. The end-user system according to claim 1, further comprising:

means for determining if each of the plurality of the multimedia input devices and/or input ports of the end-user systems are authorized by the digital content to be to be opened;

means for returning an error message to an end user in response to each of the multimedia input devices and/or input ports of the end-user system not being authorized to be opened; and

means for stopping the rendering of the at least part of the encrypted multimedia content which has been decrypted.

6. The end-user system according to claim 1, further comprising:

means for completing the rendering of the at least a part of the encrypted multimedia content which has been decrypted;

means for closing all the multimedia input devices and/or input ports of the end-user system that were used for rendering; and

means for closing all multimedia input devices and/or input ports of the end-user system that were opened during rendering.

7. The end-user system according to claim 5, wherein the means for determining if each of the multimedia input devices and/or input ports of the end-user system are authorized to be opened includes authorizing a modem connection to be opened.

8. The end-user system according to claim 4, further comprising means for determining a number of multimedia connections coupled to the end-user system.

9. The end-user system according to claim 8, wherein means for determining the number of multimedia connections coupled to the end-user system includes using a Microsoft Windows API of waveingetnumdevs( ).

10. The end-user system according to claim 1, wherein the multimedia player for rendering the encrypted digital content further comprises:

means for reading the encrypted multimedia content from a storage medium selected from a group of storage mediums consisting of disk drive, cassette tape, CD, DVD, diskette drive, network storage, zip drive, compact flash, smart flash and minidisc.