05943422 is referenced by 906 patents and cites 297 patents.

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.

Title
Steganographic techniques for securely delivering electronic digital rights management control information over insecure communication channels
Application Number
8/689606
Publication Number
5943422
Application Date
August 12, 1996
Publication Date
August 24, 1999
Inventor
Robert P Weber
Menlo Park
CA, US
David M Van Wie
Sunnyvale
CA, US
Agent
Nixon & Vanderhye P C
Assignee
InterTrust Technologies
CA, US
IPC
H04N 7/167
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