Method and system of preventing unauthorized rerecording of multimedia content

• US 7,346,580 B2
• Filed: 08/23/2001
• Issued: 03/18/2008
• Est. Priority Date: 08/13/1998
• Status: Expired due to Term

• Current Assignee: Sandpiper CDN, LLC (Theseus LF Asset Holdings, LLC)
• 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:
  US09/938,401
• Publication Number:
  US 20020107803A1
• Time in Patent Office: 2,399 Days
• Field of Search: 386/46, 398/118, 379/88, 710/72, 235/494, 370/431, 705/1, 705/51, 709/225, 709/201, 709/231, 709/250
• US Class Current: 705/50
• 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 20/00086 Circuits for prevention of unauthorised reproduction or copying, e.g. piracy indicating unauthorised use of record carriers in general G11B23/28; scrambling for television signal recording H04N5/913; network architectures or network protocols for network security H04L63/00; cryptographic mechanisms or cryptographic arrangements for secret or secure communication H04L9/00
• CPC Class Codes: G11B 20/00173 wherein the origin of the content is checked, e.g. determining whether the content has originally been retrieved from a legal disc copy or another trusted source
• CPC Class Codes: G11B 20/0021 involving encryption or decryption of contents recorded on or reproduced from a record carrier
• CPC Class Codes: G11B 20/00224 wherein the key is obtained from a remote server
• CPC Class Codes: G11B 20/0071 involving a purchase action
• CPC Class Codes: G11B 20/00753 wherein the usage restriction limits the number of copies that can be made, e.g. CGMS, SCMS, or CCI flags
• 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
• CPC Class Codes: H04L 2463/102 applying security measure for e-commerce
• 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 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. A method on an end-user device to prevent an unauthorized recording of multimedia content as a result of rendering at least part of the multimedia content, the method comprising:

accessing encrypted multimedia content intended for playing on the end-user device using multimedia output devices and/or pods of the end-user device after decryption of the multimedia content;

prior to decryption of the encrypted multimedia content, blocking access to multimedia content input devices and/or ports of the end-user device, the blocking being accomplished by opening all multimedia content input devices and/or ports of the end-user device that can receive any part of a multimedia content, to prevent use of such multimedia content input devices and/or ports, thereby preventing re-recording of decrypted multimedia content 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 content input devices and/or ports is blocked, rendering the at least part of the multimedia content.

2. The method according to claim 1, wherein the rendering of the at least part of the multimedia content is accomplished by using multimedia output devices and/or pods of the end-user device, and wherein the step of rendering further comprises:

completing the rendering of the at least part of the multimedia content;

after completion of the rendering, closing all output devices and/or ports including waveout devices that were used for rendering, thereby allowing access to such output devices and/or ports; and

after completion of the rendering, closing all input devices and/or ports including wavein devices that were opened during the rendering, thereby allowing access to such input devices and/or ports.

3. The method according to claim 1, wherein the accessing the encrypted multimedia content further comprises:

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

4. A computer readable medium containing programming instructions for an end-user device to prevent an unauthorized recording of multimedia content as a result of rendering at least part of the multimedia content, the programming instructions comprising:

accessing encrypted multimedia content intended for playing on the end-user device by using multimedia output devices and/or ports of the end-user device after decryption of the multimedia content;

prior to decryption of the encrypted multimedia content, blocking access to multimedia content input devices and/or ports of the end-user device, the blocking being accomplished by opening all multimedia content input devices and/or pods of the end-user device that can receive any part of a multimedia content, to prevent use of such multimedia content input devices and/or ports, thereby preventing re-recording of decrypted multimedia content 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 content input devices and/or ports is blocked, rendering the at least part of the multimedia content.

5. The computer readable medium according to claim 4, wherein the rendering of the at least part of the multimedia content is accomplished by using multimedia output devices and/or ports of the end-user device, and wherein the programming instructions for rendering of at least a part of the multimedia content, further comprises the programming instructions for:

completing the rendering of the at least part of the multimedia content;

after completion of the rendering, closing all output devices and/or ports including waveout devices that were used for rendering, thereby allowing access to such output devices and/or pods; and

after completion of the rendering, closing all input devices and/or ports including wavein devices that were opened during the rendering, thereby allowing access to such input devices and/or ports.

6. The computer readable medium according to claim 4, wherein the programming instructions for accessing the encrypted multimedia content further comprises the programming instructions for:

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