High-Speed Communication System and Method with Enhanced Security
First Claim
1. An apparatus for high speed communication with perfect secrecy disposed with an OTDR (Optical Time Domain Reflectometer) increased in sensitivity, wherein the sensitivity-increased OTDR includes:
- a first light source applying a first optical pulse to an optical communication path;
a coupler outputting the first optical pulse by dividing the first optical pulse at least more than two paths;
a photodetector determining a point applied with the first optical pulse on the optical communication path;
a second light source applying a second optical pulse to an optical communication path weaker in intensity than that of the first optical pulse in response to a point applied with the first optical pulse to the optical communication path;
an optical receiver receiving an optical signal returning by being reflected from the optical communication path; and
.a controller analyzing or predicting a signal leakage of the optical communication path based on a result detected from the optical receiver.
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Abstract
Disclosed is a scheme of transmitting at least two or more transmission signals, in which at least two or more pure random noise signals are contained, through multiple paths, according to one embodiment of the present invention. To implement such a scheme, a complementary noise generator may be used in a high-speed communication method and system with enhanced security according to the present invention. Here, the complementary noise generator refers to an apparatus in which a total sum of summing altogether at least two or more generated noises becomes 0. Namely, the complementary noise generator can generate m noises, and the sum of the in noises becomes 0. By injecting a plurality of noises having such feature into different paths, a channel capacity of each channel is reduced, thereby making a single wiretapping difficult. In comparison, because a receiver receiving a plurality of transmission signals with injected noises receives all noise signals and then sums up the noise signals, the noises are offset, and it is possible to effectively receive the original signal (random key K) intended for transmitting by a transmitter.
17 Citations
23 Claims
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1. An apparatus for high speed communication with perfect secrecy disposed with an OTDR (Optical Time Domain Reflectometer) increased in sensitivity, wherein the sensitivity-increased OTDR includes:
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a first light source applying a first optical pulse to an optical communication path; a coupler outputting the first optical pulse by dividing the first optical pulse at least more than two paths; a photodetector determining a point applied with the first optical pulse on the optical communication path; a second light source applying a second optical pulse to an optical communication path weaker in intensity than that of the first optical pulse in response to a point applied with the first optical pulse to the optical communication path; an optical receiver receiving an optical signal returning by being reflected from the optical communication path; and
.a controller analyzing or predicting a signal leakage of the optical communication path based on a result detected from the optical receiver. - View Dependent Claims (2, 3, 4, 5)
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6-8. -8. (canceled)
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9. The method of claim 24, wherein a sum of n number of noises is 0, and the second communication user obtains the transmission signal by offsetting the n number of noises.
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10. The method of claim 24, wherein the n number of noises is generated by a complementary noise generator and the step of transmitting, by a first communication user, to a second communication user, a transmission signal respectively infused with n number of noises (n is a natural number greater than 1) through in number of communication paths (m is a natural number greater than 1) includes a step of performing a signal modulation and distributing to the in number of communication paths, based on any one noise and the transmission signal among the n number of noises.
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11. The method of claim 24, further comprising generating the n number of noises, and the step of generating the n number of noises includes:
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distributing an optical source to a p number of channels (p is a natural number greater than n) by passing an output of BLS (Broaden Light Source) having a broad wavelength band to a first AWG (Arrayed Waveguide Grating); infusing to an RSOA (Reflective Semiconductor Optical Amplifier) by coupling the n number of optical source in the optical sources distributed to the p number of channels using a BS (Beam Splitter); and classifying an output of the RSOA as the n number of noises by passing a second AWG.
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12. A method for high speed communication with perfect secrecy, the method comprising:
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outputting an optical source corresponding to at least two modes based on a security data and multi-node laser; distributing the optical source to at least two paths based on a first WDM filter; modulating a signal transmitted from the first WDM filter based on a signal modulator; demodulating a signal transmitted through an optical communication path based on a signal demodulator; offsetting noises included in individual modes of demodulated signals based on a second WDM filter; and obtaining the security data. - View Dependent Claims (13)
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14. A method for high speed communication with perfect secrecy, the method comprising:
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dividing a security data to at least two transmission signals; at least two signals being modulated to at least two noise sources; each of the at least two transmission signals infused with the at least two noises being transmitted to a receiver through mutually same or mutually different channels; and obtaining the security data based on the at least two transmission signals included with the at least two noises received by the receiver. - View Dependent Claims (15)
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16. A method for high speed communication with perfect secrecy, the method comprising:
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transmitting, by a first communication user, to a second communication user, a signal include with a part of noises in a plurality of complementary noises through a single path and storing remaining noises in the plurality of complementary noises through other paths; generating a transmission signal by modulating the signal received by the second communication receiver and transmitting the transmission signal to the first communication user through the single path; and obtaining the transmission signal based on a modulated signal returned by the first communication user to the second communication user and the stored remaining noises. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23)
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Specification