Hiding encrypted messages in information carriers

Details Hiding encrypted messages in information carriers Hiding encrypted messages in information carriers

2005-10-25

2005-10-25

Smithers, Matthew (Department: 2137)

Electrical computers and digital processing systems: support

Multiple computer communication using cryptography

Particular communication authentication technique

C382S232000, C382S276000

Reexamination Certificate

active

06959386

ABSTRACT:
An identification code signal is hidden in a carrier signal (such as an electronic data signal or a physical medium) in a manner that permits the identification signal later to be discerned. The carrier signal can thereby be identified, or some machine responsive action can thereby be taken. The technique can be applied in video imagery embodiments to control associated video equipment, e.g. to serve as a copy control signal.

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