06047374 is referenced by 68 patents and cites 28 patents.

Arbitrary digital information is embedded within a stream of digital data, in a way that avoids detection by a casual observer and that allows a user to determine whether the digital data have been modified from their intended form. The embedded information may only be extracted as authorized and may be used to verify that the original digital data stream has not been modified.

Title
Method and apparatus for embedding authentication information within digital data
Application Number
357713
Publication Number
6047374
Application Date
May 26, 1999
Publication Date
April 4, 2000
Inventor
James M Barton
Los Gatos
CA, US
Agent
Lerner David Littenberg Krumholz & Mentlik
Assignee
Sony Corporation
JP
IPC
G09C 3/08
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