Embedded hidden identification codes in digital objects

Details Embedded hidden identification codes in digital objects Embedded hidden identification codes in digital objects

1994-06-30

1996-06-25

Cangialosi, Salvatore

Cryptography

Cryptanalysis

H04L 900

Patent

active

055307515

ABSTRACT:
A method and apparatus for encoding identification information into a stream of digital data representing an object. The digital data representing an object is modified to add embedded identification information into the data. This modification is done such that the resultant changes to the object are not objectionable to the user. By comparing the original digital data to the modified data, the possessor of the original data can recover the embedded identification information. However the identification information is effectively unavailable to anyone not possessing the original data.

REFERENCES:
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patent: 4120030 (1978-10-01), Johnstone
patent: 4658093 (1987-04-01), Hellman
patent: 5208853 (1993-05-01), Armbruster et al.
patent: 5212728 (1993-05-01), Glover et al.
patent: 5293422 (1994-05-01), Loiacono
patent: 5371792 (1994-12-01), Asai et al.
patent: 5398285 (1995-05-01), Borgelt et al.

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