Analyzing a target electromagnetic signal radiating from a computer system
First Claim
1. A method for characterizing a computer system parameter by analyzing a target electromagnetic signal radiating from the computer system, the method comprising:
- monitoring the target electromagnetic signal using a first directional antenna located outside of the computer system, wherein the first directional antenna is directed at a location inside the computer system;
monitoring the target electromagnetic signal using a second directional antenna located outside of the computer system, wherein a receiving axis of the second antenna is oriented non-parallel to a receiving axis of the first antenna, and wherein the second directional antenna is directed at the location inside the computer system;
characterizing the computer system parameter based on the target electromagnetic signal received from the first antenna and the target electromagnetic signal received from the second antenna, wherein characterizing the computer system parameter comprises;
generating a predetermined number of first directional antenna signals based on the target electromagnetic signal monitored using the first directional antenna; and
generating a predetermined number of second directional antenna signals based on the target electromagnetic signal monitored using the second directional antenna; and
generating a request for an action based on the characterization of the computer system.
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Accused Products
Abstract
One embodiment of the present invention provides a system that characterizes a computer system parameter by analyzing a target electromagnetic signal radiating from the computer system. First, the system monitors the target electromagnetic signal using a first directional antenna located outside of the computer system, wherein the first directional antenna is directed at a location inside the computer system. The system also monitors the target electromagnetic signal using a second directional antenna located outside of the computer system, wherein a receiving axis of the second antenna is oriented non-parallel to a receiving axis of the first antenna, and wherein the second directional antenna is directed at the location inside the computer system. Next, the system characterizes the computer system parameter based on the target electromagnetic signal received from the first antenna and the target electromagnetic signal received from the second antenna. Then, the system generates a request for an action based on the characterization of the computer system.
9 Citations
18 Claims
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1. A method for characterizing a computer system parameter by analyzing a target electromagnetic signal radiating from the computer system, the method comprising:
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monitoring the target electromagnetic signal using a first directional antenna located outside of the computer system, wherein the first directional antenna is directed at a location inside the computer system; monitoring the target electromagnetic signal using a second directional antenna located outside of the computer system, wherein a receiving axis of the second antenna is oriented non-parallel to a receiving axis of the first antenna, and wherein the second directional antenna is directed at the location inside the computer system; characterizing the computer system parameter based on the target electromagnetic signal received from the first antenna and the target electromagnetic signal received from the second antenna, wherein characterizing the computer system parameter comprises; generating a predetermined number of first directional antenna signals based on the target electromagnetic signal monitored using the first directional antenna; and generating a predetermined number of second directional antenna signals based on the target electromagnetic signal monitored using the second directional antenna; and generating a request for an action based on the characterization of the computer system. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A computer-readable storage medium storing instructions that when executed by a computer cause the computer to perform a method for characterizing a computer system parameter by analyzing a target electromagnetic signal radiating from the computer system, the method comprising:
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monitoring the target electromagnetic signal using a first directional antenna located outside of the computer system, wherein the first directional antenna is directed at a location inside the computer system; monitoring the target electromagnetic signal using a second directional antenna located outside of the computer system, wherein a receiving axis of the second antenna is oriented non-parallel to a receiving axis of the first antenna, and wherein the second directional antenna is directed at the location inside the computer system; characterizing the computer system parameter based on the target electromagnetic signal received from the first antenna and the target electromagnetic signal received from the second antenna, wherein characterizing the computer system parameter comprises; generating a predetermined number of first directional antenna signals based on the target electromagnetic signal monitored using the first directional antenna; and generating a predetermined number of second directional antenna signals based on the target electromagnetic signal monitored using the second directional antenna; and generating a request for an action based on the characterization of the computer system. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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18. An apparatus that characterizes a computer system parameter by analyzing a target electromagnetic signal radiating from the computer system, the apparatus comprising:
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a first directional antenna located outside of the computer system, wherein the first directional antenna is directed at a location inside the computer system; a second directional antenna located outside of the computer system, wherein the second directional antenna is directed at a location inside the computer system, wherein a receiving axis of the second antenna is oriented non-parallel to a receiving axis of the first antenna; a monitoring mechanism configured to monitor the target electromagnetic signal received by the first directional antenna and the target electromagnetic signal received by the second directional antenna; and a characterizing mechanism configured to characterize the computer system parameter based on the target electromagnetic signal, wherein the characterization mechanism includes a mechanism configured to process the target electromagnetic signal monitored using the first directional antenna and the target electromagnetic signal monitored using the second directional antenna using a coincidence detection analysis technique, and wherein the characterizing mechanism is configured to characterize the computer system parameter by; generating a predetermined number of first directional antenna signals based on the target electromagnetic signal monitored using the first directional antenna; and generating a predetermined number of second directional antenna signals based on the target electromagnetic signal monitored using the second directional antenna.
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Specification