Patent ID: 8180057

Claim:
A method for communicating data from a transmitter to a receiver, the method comprising: generating an analog chaotic signal by an autonomous fully differential chaotic circuit at the receiver, the generating including: generating a differential pair of currents by supplying a differential control voltage and positive feed back to a negative resistance circuit, the negative resistance circuit implementing a negative resistance and having nonlinear input-output characteristics; generating resonance by providing the differential pair of currents to a pair of parallel LC circuits through a pair of resistors; obtaining a first one of the analog chaotic signal from a differential pair of voltages output by the negative resistance circuit at nodes coupled to respective first electrodes of the pair of resistors; and obtaining a second one of the analog chaotic signal from the differential pair of voltages output by the negative resistance circuit at nodes coupled to respective second electrodes of the pair of resistors; storing the analog chaotic signal at the receiver to obtain a stored chaotic signal; generating a receiver signal from the stored chaotic signal; sending the receiver signal from the receiver to the transmitter; receiving the receiver signal at the transmitter; generating an encoding signal from the receiver signal; encoding the data using the encoding signal to generate encoded data; generating a transmitter signal from the encoded data; transmitting the transmitter signal from the transmitter to the receiver; receiving the transmitter signal at the receiver; generating a data signal from the transmitter signal; and decoding the data signal using the stored chaotic signal to extract the data, wherein the stored chaotic signal is a non-repeating deterministic chaotic signal that is unreplicatable by preloading a predetermined sequence.