Utilizing data reduction in steganographic and cryptographic systems
First Claim
1. A machine implemented method for producing output signals encoding content, comprising:
- watermarking, using a machine, a reduced data version of an original data signal, said original data signal containing content, to form a watermarked reduced data version of said original data signal;
adding, using said machine, said watermarked reduced data version of said original signal to a signal derived from said original data signal to produce an output signal.
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Abstract
The present invention relates to methods for protecting a data signal using the following techniques: applying a data reduction technique to reduce the data signal into a reduced data signal; subtracting the reduced data signal from the data signal to produce a remainder signal; embedding a first watermark into the reduced data signal to produce a watermarked, reduced data signal; and adding the watermarked, reduced data signal to the remainder signal to produce an output signal. A second watermark may be embedded into the remainder signal before the final addition step. Further, cryptographic techniques may be used to encrypt the reduced data signals and to encrypt the remainder signals before the final addition step.
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Citations
19 Claims
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1. A machine implemented method for producing output signals encoding content, comprising:
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watermarking, using a machine, a reduced data version of an original data signal, said original data signal containing content, to form a watermarked reduced data version of said original data signal; adding, using said machine, said watermarked reduced data version of said original signal to a signal derived from said original data signal to produce an output signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A machine implemented method for producing an output signal encoding content, comprising:
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scrambling, using a machine, a reduced data version of an original data signal to form a scrambled reduced data version of said original data signal; adding, using said machine, said scrambled reduced data version of said original data signal to a signal derived from said original data signal to produce an output signal. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification