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Hiding Messages in Secure Connection Transmissions with Full-Duplex Overt Receiver
Lap Luat Nguyen1,2, Tien-Tung Nguyen3, Anthony Fiche4
1School of Electrical Engineering, International University, Ho Chi Minh City 700000, Vietnam.
Sensors (Basel, Switzerland)
|August 12, 2022
Summary
This study explores secure communication by hiding covert messages within overt transmissions using artificial noise. Enhanced artificial noise power and improved receiver performance boost covert communication security and efficiency.
Area of Science:
- Information Security
- Wireless Communication
- Signal Processing
Background:
- Full-duplex receivers can emit artificial noise to secure transmissions.
- Covert communication aims to transmit messages undetected by eavesdroppers (wardens).
- Exploiting warden uncertainties is key to successful covert transmissions.
Purpose of the Study:
- To analyze the performance of covert communication systems employing full-duplex receivers with artificial noise.
- To determine the covert throughput and the warden's average detection error probability.
- To investigate the impact of system parameters on covert communication performance.
Main Methods:
- Modeling a system with a transmitter, a full-duplex receiver emitting artificial noise, and a warden.
- Exploiting the warden's uncertainties in decoding overt messages and received artificial noise power.
- Deriving mathematical expressions for covert throughput and warden's detection error probability.
Main Results:
- Increasing artificial noise transmit power improves covert performance.
- Enhanced secure connections at the overt user benefit covert communication.
- Improved self-interference cancellation at the full-duplex receiver positively impacts covert performance.
- Closer proximity of the warden to the full-duplex receiver enhances covert performance.
Conclusions:
- System parameters like artificial noise power and self-interference cancellation directly influence covert communication effectiveness.
- Overt transmission security and performance positively correlate with covert communication success.
- The warden's location relative to the receiver is a critical factor in covert transmission security.
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