System and method of masking electromagnetic interference (EMI) emissions of a circuit
First Claim
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1. A system comprising:
- a random number generator which matches a frequency of a circuit to be protected, and which generates a random signal to be superimposed on data;
a low noise amplifier which receives the random signal from the random number generator;
an antenna which receives the random signal from the low noise amplifier and transmits the random signal to mask the data of the circuit to be protected;
a mixer coupled to the low noise amplifier, wherein the mixer provides a reduced current consumption and performs power amplification as needed at the output, and a resulting modulated signal is output to the antenna without an intermediate power amplification stage; and
a control macro which determines a decrease in clock rate frequency when battery power is running low and provides updated information to the random number generator which then uses the updated information to adjust its frequency consistent with that of a clock rate frequency, whereinthe random signal superimposed on the data cannot be filtered from the data.
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Abstract
A system is provided for securing information residing on a circuit (e.g., processor). In particular, a system and method is provided for masking electromagnetic interference (EMI) emissions emitting from a circuit using a random noise generator in combination with a low noise amplifier and antenna. The random number generator matches a frequency of a circuit to be protected, and generates a random signal to be superimposed on data. The low noise amplifier receives the random signal from the random number generator, and an antenna receives the random signal from the low noise amplifier and transmits the random signal to mask the data of the circuit to be protected.
11 Citations
23 Claims
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1. A system comprising:
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a random number generator which matches a frequency of a circuit to be protected, and which generates a random signal to be superimposed on data; a low noise amplifier which receives the random signal from the random number generator; an antenna which receives the random signal from the low noise amplifier and transmits the random signal to mask the data of the circuit to be protected; a mixer coupled to the low noise amplifier, wherein the mixer provides a reduced current consumption and performs power amplification as needed at the output, and a resulting modulated signal is output to the antenna without an intermediate power amplification stage; and a control macro which determines a decrease in clock rate frequency when battery power is running low and provides updated information to the random number generator which then uses the updated information to adjust its frequency consistent with that of a clock rate frequency, wherein the random signal superimposed on the data cannot be filtered from the data. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A system structured to mask data from a circuit, comprising:
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a random number generator coupled to a circuit; a low noise amplifier coupled to the random number generator; an antenna coupled to the low noise amplifier; a mixer coupled to the low noise amplifier, wherein the random number generator is operated at a frequency consistent with the circuit or a function of the circuit to be protected and generates random data superimposed on native electromagnetic interference (EMI) emissions originating from the circuit or the function of the circuit to be protected, the antenna transmits the random data to mask the data of the circuit to be protected, and the mixer provides a reduced current consumption and performs power amplification as needed at the output, and a resulting modulated signal is output to the antenna without an intermediate power amplification stage; and a control macro which is structured to balance the random number generator at a matched frequency of the circuit, creating a random number seed that sets an ever changing transmitting signal such that electrical emissions of active circuits are corrupted when monitored by a listening device, and further determines a decrease in clock rate frequency when battery power is running low and provides updated information to the random number generator which then uses the updated information to adjust its frequency consistent with that of a clock rate frequency. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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19. A method comprising:
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generating random data through a random number generator which matches a frequency of a circuit to be protected; superimposing the random data on native electromagnetic interference (EMI) emissions originating from a circuit or function of the circuit to be protected and at a frequency consistent with the circuit or the function of the circuit to be protected so that the random data superimposed on the native EMI emissions cannot be filtered; mixing the random data so as to create a modulated signal with a reduced current consumption; transmitting the modulated signal such that the transmitted random data masks the native electromagnetic interference (EMI) emissions originating from the circuit or the function of the circuit to be protected; balancing the random number generator at a matched frequency of the circuit and creating a random number seed that sets an ever changing transmitting signal such that electrical emissions of active circuits are corrupted when monitored by a listening device; and determining a decrease in clock rate frequency when battery power is running low and providing such updated information to the random number generator which then uses the updated information to adjust its frequency consistent with that of a clock rate frequency. - View Dependent Claims (20)
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21. A system comprising:
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a random number generator which matches a frequency of a circuit to be protected, and which generates a random signal to be superimposed on data; a low noise amplifier which receives the random signal from the random number generator; an antenna which receives the random signal from the low noise amplifier and transmits the random signal to mask the data of the circuit to be protected; and a control macro which is structured to balance the random number generator at a matched frequency of the circuit, creating a random number seed that sets an ever changing transmitting signal such that electrical emissions of active circuits are corrupted when monitored by a listening device, wherein; the random signal superimposed on the data cannot be filtered from the data; and the control macro determines a decrease in clock rate frequency when battery power is running low and provides such updated information to the random number generator which then uses the updated information to adjust its frequency consistent with that of a clock rate frequency. - View Dependent Claims (22, 23)
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Specification