Devices for emitting or receiving signals encrypted by deterministic chaos, and a transmission system, in particular a radio transmission system, including such devices
First Claim
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1. A sender device for sending an encrypted information signal, the device comprising:
- means for generating chaotic signals comprisinga source producing a chaotic signal and provided with a feedback loop comprising means for generating time delay, and a non-linear circuit element,means for producing the encrypted information signal comprisinga mixer circuit element to inject an information signal to encrypt the information signal, received on one input, into the chaotic signal propagating in the feedback loop, received on another input,wherein the feedback loop includes means for filter-forming to limit the spectrum of the chaotic signal to one or more spectrum bands to allow the sender to directly transmit the chaotic signal obtained from the feed back loop, and the encrypted information signal enables a receiver device to be self-synchronized.
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Abstract
A sender device for sending an encrypted signal, the device comprising a chaos generator producing an encrypted electrical signal and a feedback loop comprising delayline-forming means, non-linear means, and mixer means which receive the loop signal on one input and the signal to be encrypted on another input, wherein the feedback loop includes filter-forming means which limit the spectrum of the encrypted signals to one or more spectrum bands.
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Citations
10 Claims
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1. A sender device for sending an encrypted information signal, the device comprising:
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means for generating chaotic signals comprising a source producing a chaotic signal and provided with a feedback loop comprising means for generating time delay, and a non-linear circuit element, means for producing the encrypted information signal comprising a mixer circuit element to inject an information signal to encrypt the information signal, received on one input, into the chaotic signal propagating in the feedback loop, received on another input, wherein the feedback loop includes means for filter-forming to limit the spectrum of the chaotic signal to one or more spectrum bands to allow the sender to directly transmit the chaotic signal obtained from the feed back loop, and the encrypted information signal enables a receiver device to be self-synchronized. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification