06240185 is referenced by 356 patents and cites 295 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
9/247328
Publication Number
6240185 (B1)
Application Date
February 10, 1999
Publication Date
May 29, 2001
Inventor
Robert P Weber
Menlo Park
CA, US
David M Van Wie
Eugene
OR, US
Agent
Finnegan Henderson Farabow Garrett & Dunner L
US
Assignee
Intertrust Technologies Corporation
CA, US
IPC
H04N 7/167
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