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Enabling Covert Body Area Network using Electro-Quasistatic Human Body Communication.
Debayan Das1, Shovan Maity2, Baibhab Chatterjee2
1Purdue University, School of Electrical and Computer Engineering, West Lafayette, IN, 47907, USA. das60@purdue.edu.
Scientific Reports
|March 13, 2019
Summary
Electro-Quasistatic Human Body Communication (EQS-HBC) enhances wearable device security by localizing signals within the body. This method significantly reduces signal leakage, making covert communication channels extremely difficult for eavesdroppers to access.
Area of Science:
- Biomedical Engineering
- Communication Systems
- Cybersecurity
Background:
- Traditional wireless communication for wearable and implantable devices relies on electromagnetic (EM) fields, posing security risks due to signal propagation in all directions.
- Human Body Communication (HBC) utilizes the body for energy-efficient transmission but conventional methods still suffer from radiation and compromised security.
- The need for secure, localized communication channels for sensitive data in connected healthcare and augmented reality applications is critical.
Purpose of the Study:
- To introduce and analyze Electro-Quasistatic Human Body Communication (EQS-HBC) as a novel method for secure, localized signal transmission within the human body.
- To demonstrate the enhanced privacy and covert communication capabilities of EQS-HBC compared to traditional EM and HBC methods.
- To quantify the reduction in signal leakage and detection range achieved by EQS-HBC.
Main Methods:
- Development and implementation of Electro-Quasistatic Human Body Communication (EQS-HBC) using low-frequency, carrier-less broadband transmission.
- Theoretical modeling and analysis of signal propagation and leakage characteristics for EQS-HBC.
- Experimental validation of signal detection ranges for EQS-HBC, conventional HBC, and on-body EM wireless communication.
Main Results:
- EQS-HBC effectively localizes signals within the human body, creating a covert communication channel.
- The quasi-static (QS) leakage from the EQS-HBC transmitter-human body interface is detectable up to <0.15 meters.
- Human body alone exhibits minimal leakage (~0.01 meters), while conventional on-body EM wireless communication has a detection range exceeding 5 meters.
Conclusions:
- EQS-HBC offers a significant advancement in secure communication for wearable and implantable devices by minimizing signal leakage.
- The localized nature of EQS-HBC drastically reduces the risk of data interception by nearby eavesdroppers, enhancing user privacy.
- This technology paves the way for more secure applications in connected healthcare, electroceuticals, and augmented reality.
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