System and method for generating an obfuscated optical signal
First Claim
1. A method performed at an optical transmitter comprising:
- receiving an optical signal carrying data for transmission;
performing a time-varying modification of the optical signal carrying the data to generate an obfuscated optical signal; and
transmitting the obfuscated optical signal;
wherein the time-varying modification is performed in accordance with a plurality of values corresponding to a respective plurality of values for use in at least partially deobfuscating the obfuscated optical signal to allow for detection of the data carried by the received optical signal; and
wherein the optical signal has a first polarization and a second polarization, and wherein performing the time-varying modification of the optical signal comprises applying a first time-varying modification to the first polarization, and when applying the first time-varying modification to the first polarization, either;
applying no modification to the second polarization or applying a second modification, different from the first time-varying modification, to the second polarization.
1 Assignment
0 Petitions
Accused Products
Abstract
A system and method for obfuscating an optical signal is disclosed. Obfuscating the optical signal may make it more difficult for the optical signal to be detected by an interloper. In one embodiment, an optical signal is received at an optical transmitter, and an obfuscated optical signal is generated by performing a modification of the received optical signal. The obfuscated optical signal is then transmitted from the optical transmitter to an optical receiver. An at least partially deobfuscated optical signal is generated at the optical receiver by performing a modification of the obfuscated optical signal. The modification performed at the optical receiver corresponds to the modification performed at the optical transmitter.
119 Citations
28 Claims
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1. A method performed at an optical transmitter comprising:
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receiving an optical signal carrying data for transmission; performing a time-varying modification of the optical signal carrying the data to generate an obfuscated optical signal; and transmitting the obfuscated optical signal; wherein the time-varying modification is performed in accordance with a plurality of values corresponding to a respective plurality of values for use in at least partially deobfuscating the obfuscated optical signal to allow for detection of the data carried by the received optical signal; and wherein the optical signal has a first polarization and a second polarization, and wherein performing the time-varying modification of the optical signal comprises applying a first time-varying modification to the first polarization, and when applying the first time-varying modification to the first polarization, either;
applying no modification to the second polarization or applying a second modification, different from the first time-varying modification, to the second polarization. - View Dependent Claims (2, 3, 4, 5, 6, 23)
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7. An optical transmitter comprising:
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an optical signal modifier for performing a time-varying modification of a received optical signal carrying data to generate an obfuscated optical signal; and a network output port for transmitting the obfuscated optical signal; wherein the time-varying modification is performed in accordance with a plurality of values corresponding to a respective plurality of values for use in at least partially deobfuscating the obfuscated optical signal to allow for detection of the data carried by the received optical signal; and wherein the received optical signal has a first polarization and a second polarization, and wherein the optical signal modifier is configured to perform the time-varying modification by;
applying a first time-varying modification to the first polarization, and when applying the first time-varying modification to the first polarization, either;
applying no modification to the second polarization or applying a second modification, different from the first time-varying modification, to the second polarization. - View Dependent Claims (8, 9, 24)
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10. A method performed at an optical receiver comprising:
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receiving an obfuscated optical signal carrying data; and performing a time-varying modification of the obfuscated optical signal to generate an at least partially deobfuscated optical signal carrying the data to allow for detection of the data; wherein the time-varying modification is performed in accordance with a plurality of values corresponding to a respective plurality of values for use in generating the obfuscated optical signal; and wherein the obfuscated optical signal has a first polarization and a second polarization, and wherein performing the time-varying modification of the obfuscated optical signal comprises applying a first time-varying modification to the first polarization, and when applying the first time-varying modification to the first polarization, either;
applying no modification to the second polarization or applying a second modification, different from the first time-varying modification, to the second polarization. - View Dependent Claims (11, 12, 13, 14, 15, 25)
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16. An optical receiver comprising:
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a network input port for receiving an obfuscated optical signal carrying data; and an optical signal modifier for performing a time-varying modification of the obfuscated optical signal to generate an at least partially deobfuscated optical signal carrying the data to allow for detection of the data; wherein the time-varying modification is performed in accordance with a plurality of values corresponding to a respective plurality of values for use in generating the obfuscated optical signal; and wherein the obfuscated optical signal has a first polarization and a second polarization, and wherein the optical signal modifier is configured to perform the time-varying modification by;
applying a first time-varying modification to the first polarization, and when applying the first time-varying modification to the first polarization, either;
applying no modification to the second polarization or applying a second modification, different from the first time-varying modification, to the second polarization. - View Dependent Claims (17, 18, 26)
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19. A method comprising:
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receiving an optical signal carrying data at an optical transmitter; performing a time-varying modification of the optical signal carrying the data at the optical transmitter to generate an obfuscated optical signal; transmitting the obfuscated optical signal to an optical receiver; receiving the obfuscated optical signal at the optical receiver; and performing a corresponding time-varying modification of the obfuscated optical signal at the optical receiver to generate an at least partially deobfuscated optical signal carrying the data to allow for detection of the data; wherein the time-varying modification of the optical signal is performed in accordance with a plurality of values corresponding to a respective plurality of values used for performing the corresponding time-varying modification of the obfuscated optical signal; and wherein the optical signal has a first polarization and a second polarization, and wherein performing the time-varying modification of the optical signal comprises applying a first time-varying modification to the first polarization, and when applying the first time-varying modification to the first polarization, either;
applying no modification to the second polarization or applying a second modification, different from the first time-varying modification, to the second polarization. - View Dependent Claims (20, 27)
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21. An optical communication system comprising:
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an optical transmitter having;
an optical signal modifier for performing a time-varying modification of an optical signal carrying data to generate an obfuscated optical signal, and a network output port for transmitting the obfuscated optical signal;an optical receiver having;
a network input port for receiving the obfuscated optical signal, and a corresponding optical signal modifier for performing a corresponding time-varying modification of the obfuscated optical signal to generate an at least partially deobfuscated optical signal carrying the data to allow for detection of the data;wherein the time-varying modification of the optical signal is performed in accordance with a plurality of values corresponding to a respective plurality of values used for performing the corresponding time-varying modification of the obfuscated optical signal; and wherein the optical signal has a first polarization and a second polarization, and wherein the optical signal modifier is configured to perform the time-varying modification of the optical signal by;
applying a first time-varying modification to the first polarization, and when applying the first time-varying modification to the first polarization, either;
applying no modification to the second polarization or applying a second modification, different from the first time-varying modification, to the second polarization. - View Dependent Claims (22, 28)
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Specification