Steganographic data hiding using a device clock
First Claim
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1. A method comprising:
- obtaining plural-bit auxiliary information; and
during communication between a first computer and a second computer over a network, modulating timing or phase of a clock signal generated by the first computer so as to steganographically hide the plural-bit auxiliary information in a communications signal sent between the first computer and the second computer.
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Abstract
The presently claimed invention relates generally to methods and apparatus associated with steganographic encoding (e.g., data hiding). One claim recites a method including: obtaining plural-bit auxiliary information; and during communication between a first computer and a second computer over a network, modulating timing or phase of a clock signal generated by the first computer so as to steganographically hide the plural-bit auxiliary information in a communications signal sent between the first computer and the second computer. Of course, other claims and combinations are provided as well.
240 Citations
11 Claims
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1. A method comprising:
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obtaining plural-bit auxiliary information; and during communication between a first computer and a second computer over a network, modulating timing or phase of a clock signal generated by the first computer so as to steganographically hide the plural-bit auxiliary information in a communications signal sent between the first computer and the second computer. - View Dependent Claims (2, 3, 4, 10, 11)
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5. An apparatus comprising:
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an input or memory to receive plural-bit auxiliary information there from; a signal generator; an output to communicate with a different apparatus over a network, the output communicating a clock signal generated by the signal generator, the signal generator modulating timing or phase of the clock signal so as to steganographically hide the plural-bit auxiliary information in the signal. - View Dependent Claims (6, 7, 8, 9)
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Specification