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Steganographic techniques for securely delivering electronic digital rights management control information over insecure communication channels

a technology of electronic control information and communication channels, applied in computer security arrangements, record information storage, two-way working systems, etc., can solve the problems of inability to easily circumvent methods, inability to manage rights and copyright in analog realms, and high cost of conversion from analog to digital. achieve the effect of preserving noise and ensuring accuracy

Inactive Publication Date: 2009-04-30
INTERTRUST TECH CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent text discusses the problem of managing rights and protecting copyright in the analog realm, which is significant because most important information signals are in analog form. Existing methods for managing rights and protecting copyright in the analog realm are primitive or non-existent. The text also highlights the difficulty of securely associating rights management information with the content being protected. The lack of strong rights management for analog signals creates a need to seamlessly integrate analog delivery models with modern electronic digital rights management techniques.

Problems solved by technology

It will cost a great deal to convert local cable distribution from analog to digital.
Despite the pervasiveness of analog signals, existing methods for managing rights and protecting copyright in the analog realm are primitive or non-existent.
These methods can generally be easily circumvented.Not all existing devices respond appropriately to copy protection signals.Existing schemes are limited for example to “copy / no copy” controls.Copy protection for sound recordings has not been commercially implemented.
A related problem relates to the conversion of information between the analog and digital domains.
Even if information is effectively protected and controlled initially using strong digital rights management techniques, an analog copy of the same information may no longer be securely protected.
Unfortunately, sending digital information using such known digital encoding techniques is problematic because the digital information is not persistent.
Attempting to use insecure techniques for providing rights management is at best ineffective, and can be worse than no rights management at all.
More nefariously, an unscrupulous person could alter an insecure system by substituting false control information in place of the proper information.
Such substitutions could, for example, divert payments to someone other than legitimate rights holders—facilitating electronic fraud and theft.
Prior, insecure techniques fail to solve the overall problem of how to provide and securely manage advanced automatic electronic rights management for analog and other information signals conveyed over an insecure communications channel.
The lack of strong rights management for analog signals creates a huge gap in any comprehensive electronic rights management strategy, and makes it possible for consumers and others to circumvent—to at least some extent—even the strongest digital rights management technologies.
Anyone intercepting the paper will be unable to detect the secret message—or even know that it is there—unless the interceptor knows to look for the invisible message and also knows how to treat the paper to make the invisible ink visible
It may be difficult to detect (even with educated signal processing techniques) that the analog signal has been steganographically encoded with a rights management control signal, and it may be difficult to eliminate the steganographically encoded control signal without destroying or degrading the other information or content the signal carries.
Spectral transforms may be used to apply and recover such steganographically-encoded high frequencynoise.” Since the high frequency noise components of the information signal may be essentially random, adding a pseudo-random steganographically encoded control signal component may introduce substantially no discernible information signal degradation, and may be difficult to strip out once introduced (at least without additional knowledge of how the signal was incorporated, which may include a shared secret).

Method used

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  • Steganographic techniques for securely delivering electronic digital rights management control information over insecure communication channels
  • Steganographic techniques for securely delivering electronic digital rights management control information over insecure communication channels
  • Steganographic techniques for securely delivering electronic digital rights management control information over insecure communication channels

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example electronic appliances

[0091]The present inventions may be used with all sorts of different kinds of electronic appliances 100 each of which may include a rights management component 124. FIGS. 1A-1E show various example electronic appliances 100 embodying aspects of the present invention. For example:[0092]FIG. 1A shows an example media player 102 capable of playing Digital Versatile Disks (DVDs) 104 on a home color television set 106. For example, media player 102 may provide analog output signals to television set 106, and may also process digitized video and / or audio analog signals stored on optical disk 104. Rights management component 124A provides digital rights protection based on steganographically encoded controls 126.[0093]FIG. 1B shows an example set top box 108 that can receive cable television signals (for example, via a satellite dish antenna 110 from a satellite 112) for performance on home television set 106. Set top box 108 shown in FIG. 1B may receive television signals from antenna 110...

example control

Steps

[0162]FIG. 13 shows example control steps that may be performed by protected processing environment 138 (e.g., security microprocessor 200) to provide electronic digital rights protection. The FIG. 13 read / play routine 300 begins with protected processing environment 138 applying rules 126—in effect, setting the initial state in which rights management can occur (FIG. 13, block 302). Protected processing environment 138 then reads the output of CD-ROM decoder 310 (FIG. 13, block 304) and obtains steganographically encoded data from the output stream (FIG. 13, block 306). If protected processing environment 138 encounters the beginning of the control information organizational structure (“yes” exit to decision block 308), the protected processing environment performs an initialization step (FIG. 13, block 310) to begin receiving new control information 126 and then returns to block 302 to again apply current control information (FIG. 13, block 302). If, on the other hand, protec...

examples

[0173]FIG. 15A shows an example analog signal distribution arrangement 500 provided in accordance with this invention. Within arrangement 500, a steganographic encode block 400 encodes an analog information signal A with rights management control information 126 and associated organizational structure(s) 136. The steganographically encoded information signal A′ is distributed by various mechanisms to user electronic appliances 100. For example, the encoded signal A′ may be broadcast wirelessly over the air by a broadcaster 60A, distributed over a cable television network by a cable television head end 502, and / or distributed via a satellite communications network 504. Encoded signal A′ may, during the process of being distributed, be converted from analog to digital form and back again. For example, the satellite uplink 504A may digitize signal A′ before transmitting it to the satellite 504b, and the satellite downlink 504c may convert the signal back to analog before providing it t...

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Abstract

Electronic steganographic techniques can be used to encode a rights management control signal onto an information signal carried over an insecure communications channel. Steganographic techniques ensure that the digital control information is substantially invisibly and substantially indelibly carried by the information signal. These techniques can provide end-to-end rights management protection of an information signal irrespective of transformations between analog and digital. An electronic appliance can recover the control information and use it for electronic rights management to provide compatibility with a Virtual Distribution Environment. In one example, the system encodes low data rate pointers within high bandwidth time periods of the content signal to improve overall control information read / seek times.

Description

CROSS REFERENCE TO RELATED APPLICATION[0001]This is a continuation of application Ser. No. 10 / 618,427, filed Jul. 10, 2003, which is a continuation of application Ser. No. 10 / 189,231, filed Jul. 5, 2002, now U.S. Pat. No. 6,618,484, which is a continuation of application Ser. No. 09 / 790,566, filed Feb. 23, 2001, now U.S. Pat. No. 6,449,367, which is a continuation of application Ser. No. 09 / 247,328, filed Feb. 10, 1999, now U.S. Pat. No. 6,240,185, which is a continuation of application Ser. No. 08 / 689,606, filed Aug. 12, 1996, now U.S. Pat. No. 5,943,422, all of which are incorporated herein by reference and to which the benefit of priority is claimed.[0002]This application is related to commonly assigned copending application Ser. No. 08 / 388,107 of Ginter et al., filed 13 Feb. 1995, entitled “SYSTEMS AND METHODS FOR SECURE TRANSACTION MANAGEMENT AND ELECTRONIC RIGHTS PROTECTION,” (now abandoned). We incorporate by reference, into this application, the entire disclosure of this pri...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): H04L9/32H04L9/06H04K1/00G06F1/00G06F12/14G06F21/00G11B20/00G11B27/031G11B27/32H04L12/40H04L12/64H04N7/173H04N21/2347H04N21/254H04N21/426H04N21/4405H04N21/4415H04N21/442H04N21/4627H04N21/835H04N21/8358
CPCG06F12/1483H04L63/0428G06F2211/007G06Q20/3821G11B20/00086G11B20/00159G11B20/00188G11B20/00195G11B20/0021G11B20/00557G11B20/0071G11B20/00768G11B20/0084G11B20/00884G11B27/031G11B27/329G11B2020/10916G11B2220/216G11B2220/218G11B2220/2562G11B2220/2575H04L12/40104H04L12/40117H04N5/765H04N5/772H04N5/775H04N5/85H04N5/913H04N7/173H04N9/8042H04N21/2347H04N21/2541H04N21/42646H04N21/4405H04N21/4415H04N21/44204H04N21/44236H04N21/4627H04N21/835H04N21/8358H04N2005/91321H04N2005/91328H04N2005/91335H04N2005/91364G06F21/10
Inventor VAN WIE, DAVID M.WEBER, ROBERT P.
Owner INTERTRUST TECH CORP
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