05687236 is referenced by 479 patents and cites 19 patents.

An apparatus and method for encoding and decoding additional information into a stream of digitized samples in an integral manner. The information is encoded using special keys. The information is contained in the samples, not prepended or appended to the sample stream. The method makes it extremely difficult to find the information in the samples if the proper keys are not possessed by the decoder. The method does not cause a significant degradation to the sample stream. The method is used to establish ownership of copyrighted digital multimedia content and provide a disincentive to piracy of such material.

Title
Steganographic method and device
Application Number
489172
Publication Number
5687236
Application Date
December 31, 1996
Publication Date
November 11, 1997
Inventor
Marc Cooperman
Palo Alto
CA, US
Scott A Moskowitz
Tokyo
JP
Agent
Kenyon & Kenyon
Assignee
The Dice Company
FL, US
IPC
H04L 9/00
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