Method and apparatus for embedding authentication information wi

Details Method and apparatus for embedding authentication information wi Method and apparatus for embedding authentication information wi

1994-12-14

1997-07-08

Gregory, Bernarr E.

Cryptography

Particular algorithmic function encoding

Nbs/des algorithm

380 25, 380 30, 380 49, H04L 900

Patent

active

056469977

ABSTRACT:
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.

REFERENCES:
patent: 4639548 (1987-01-01), Oshima et al.
"[Argent] digital watermark system," 1995, DICE Corp.
"[Image] Download MS Word Version", No Date, No Publisher.
"NEC's `watermark` tech aimed at Web" by George Leopold.

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