05912972 is referenced by 147 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
5912972
Application Date
March 26, 1997
Publication Date
June 15, 1999
Inventor
James M Barton
Los Gatos
CA, US
Agent
Lerner David Littenberg Krumholz & Mentlik
Assignee
Sony Corporation
JP
IPC
H04L 9/00
View Original Source