Coherent Baseband Signal Cancellation Against EM Snooping
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Solution Overview
Problem
IoT devices in private 5G networks are vulnerable to data theft through electromagnetic signal interception by nefarious actors who can detect and decode unencrypted baseband signals emitted by components like processors and memory before they are upconverted for transmission.
Innovation Solution
Generate and transmit a coherent signal at an opposite phase to cancel the baseband signal emitted by IoT device components, creating a directional virtual Faraday cage to prevent signal detection by external snooping devices while allowing upconverted signals to be transmitted.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If baseband signals are transmitted without encryption, then communication efficiency and device complexity are maintained, but security against electromagnetic interception is compromised
Solution Approach 1:
The system performs preliminary actions by detecting the presence of snooping devices before transmitting baseband signals, and pre-generates coherent cancellation signals based on predicted snooper locations and frequencies. This allows the system to establish electromagnetic cancellation fields in advance, preventing signal interception without requiring complex real-time encryption processing.
Solution Approach 2:
The invention converts the harmful electromagnetic emissions from snooping devices into a beneficial detection mechanism. By monitoring electromagnetic signals in the environment, the system identifies snooper presence and uses their own emissions as reference to generate coherent cancellation signals, effectively turning the threat into part of the defense mechanism.
2Reliability
If coherent cancellation signals are transmitted to block baseband signals, then security against snooping is improved, but energy consumption and interference with legitimate communications increase
Solution Approach 1:
The system applies partial action by generating coherent cancellation signals only in specific directions and frequency ranges where snooping is detected, rather than transmitting cancellation signals omnidirectionally across all frequencies. The cancellation field is concentrated precisely where needed to block baseband signals from snooters, reducing overall energy consumption while maintaining security effectiveness.
Solution Approach 2:
The system continuously monitors electromagnetic environments for signs of snooping activity and adjusts coherent signal transmission accordingly. When snoopers are detected, the system activates cancellation fields; when no threat is present, transmission is reduced or stopped. This feedback mechanism ensures energy is consumed only when security threats are actually present.
3Reliability
If coherent signals are transmitted to create a virtual Faraday cage, then signal detection by external devices is blocked, but directional precision and signal strength for legitimate communication are reduced
Solution Approach 1:
The system creates localized electromagnetic cancellation fields with specific spatial and spectral characteristics tailored to block signals in particular directions where snooping is detected. Rather than creating a uniform omnidirectional Faraday cage, the coherent cancellation signals are directed precisely at suspected snooper locations, maintaining signal quality and strength in other directions for legitimate communications.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Effectively blocks external detection of unencrypted baseband signals, maintaining network security and connectivity by reducing signal energy outside the IoT device's vicinity, while ensuring legitimate communication operations continue.
Implementation Method 1
Generate and transmit a coherent signal at an opposite phase to cancel the baseband signal emitted by IoT device components
Implementation Method 2
A nefarious actor may be able to steal information from an enterprise or other entity by listening and sniffing electromagnetic signals from IoT/OT devices
Data Source
AI summary
A coherent signal is transmitted to cancel a baseband signal at a baseband frequency generated by a component of a wireless communication device while information corresponding to the baseband signal may be transmitted from the wireless communication device at an upconverted frequency. Generating and transmitting of the coherent signal may be responsive to detecting signal energy of a remotely generated baseband energy that may be generated by a remote sniffing device attempting to eavesdrop, or snoop, and remotely and wirelessly steal information from detecting of the baseband signal's electromagnetic energy. The coherent signal may be transmitted directionally to increase cancellation of the baseband signal at a likely location, or in a likely direction, of the eavesdropping device.