Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

IEEE Vehicular Technology Conference

Signal Conversion: Combat Eavesdropping for Physical Layer Security Improvement

Datong Xu, Pinyi Ren, Qinghe Du, Li Sun, Yichen Wang

Published Jun 1, 2017• 1 citation
Publisher

Abstract

Eavesdropping in wireless communication environment should be suppressed. However, most existing schemes ordinarily focus on secrecy rate enhancement, which may not be achieved with the non-Gaussian signals. Therefore, we consider this security problem from the actual signal point of view. On the basis of this premise, a novel scheme is proposed. In our scheme, each original signal in one constellation is converted as a transmitted signal in another constellation, and the principle of this variation can be safely told to the user without being learned by others. With this conversion, the eavesdropper is difficult to restore the original signals. Performance analysis and simulation results illustrate that the proposed scheme is efficient for physical layer security improvement.

DOI
10.1109/vtcspring.2017.8108520

Related papers

Physical Layer Security Improvement by Constellation Selection and Artificial Interference

Datong Xu, Pinyi Ren, Qinghe Du +2 more

We propose a novel physical layer scheme to suppress eavesdropping. Different from the existing schemes which are based on secrecy rate enhancement with Gaussian signal, our scheme is executed from the actual signal point of view. In our scheme, we set several structures of constellations for each modulation mode, and then different structures are utilized for different signals' modulations. In this case, on one hand, even though the eavesdropper knows this modulation mode, he#x002F;she is difficult to demodulate each signal. On the other hand, the information related to this constellation selection is safely delivered to the authorized user by a well-designed mechanism. Moreover, an auxiliary artificial interference method is introduced for further confusing the eavesdropper. In a word, our scheme is feasible for physical layer security improvement.

IEEE Wireless Communications and Networking Conference•Mar 1, 2017•6 citations

A Hybrid Scheme for Wireless Physical Layer Security Based on Encryption and Channel Pre-compensation

Mohammad Tahir, Mohammad Umar Siddiqi

In this paper, a hybrid scheme to provide wireless physical layer security based on encryption and wireless channel pre-compensation is presented. The physical layer security is provided by converting the signal constellation into a higher order constellation by using conventional encryption (symmetric key encryption) and then using channel state information (i.e. amplitude and phase variation), which is location specific, to further encrypt the constellation before transmission. Since detection and demodulation are based upon the known signal constellation, which is not known in advance in our case, it becomes difficult for the eavesdropper to determine the original signal constellation. The data intercepted by the eavesdropper is unintelligible due to the combined effect of encryption and pre-compensation. Using bit error rate (BER) as performance metric, it is found that the eavesdropper suffers from high BER as compared to its legitimate counterpart hence providing secure communication. The developed scheme was tested with existing wireless communication standard IEEE 802.11 to show the practical application of the scheme.

IETE Journal of Research•Jul 4, 2014•0 citations

Combat eavesdropping by full-duplex technology and signal transformation in non-orthogonal multiple access transmission

Datong Xu, Pinyi Ren, Qinghe Du +2 more

Non-orthogonal multiple access (NOMA) is an important multiple access mode in 5G. Nevertheless, eavesdropping may appear between the users in NOMA. In this case, physical layer security schemes can be introduced to combat eavesdropping. Different from the existing schemes, eavesdropping suppression in NOMA should be based on several rules: (i) successive interference cancellation (SIC) should be normally operated; (ii) each user can not attain others' privacy information; (iii) each adopted scheme had better not to depend on the spatial disparity between channels (since the channels may have the strong spatial similarity). Therefore, we propose a novel scheme to adapt to these rules. In our scheme, the original signals of users are separately transformed into the transmitted signals by a well-designed angle conversion method, and the principles of these variations for diverse users are different. Furthermore, an auxiliary mechanism with full-duplex technology is devised to guarantee the users to safely learn the principles, respectively. Through this scheme, each user can deduce other users' transmitted signals for SIC, while the original signals are difficult to be determined from transmitted signals. Hence, our scheme can effectively improve security.

International Conference on Communications•May 1, 2017•14 citations

Static and Dynamic Finite Constellation Decomposition for Wireless Physical Layer Security

Eyyüp Taşçı, Arman Tan, Timur Zirtiloglu +3 more

Security is a critical element in the design of communication systems. However, despite its essential role in enabling low-cost implementations and robust theoretical foundations, physical layer security is often overlooked in developing countermeasures against eavesdropping. In this work, we propose practical physical-layer countermeasures that enhance secrecy with low computational overhead. Our approach decomposes the constellation diagram using basis vectors, constructing the original message symbol in the main lobe aimed at the intended receiver, while projecting randomized constellation points in other directions to mislead potential eavesdroppers. When the eavesdropper’s location is known, we use static basis vectors, achieving a higher level of secrecy in that direction. When the location is unknown, we dynamically change the basis vectors to provide information-theoretic security in all directions through basis vector randomization. This design enables the intended receiver to operate without knowledge of the basis vectors, reducing receiver overhead. We evaluate the scheme’s secrecy performance through bit error rate and secrecy rate analyses, demonstrating its potential to improve physical layer security.

IEEE International Conference on Communications workshops•Jun 8, 2025•1 citation

Wireless physical layer security using channel state information

Mohammad Tahir, Sigit P. W. Jarot, Mohammad Umar Siddiqi

In this paper we consider the problem of secure communication between two nodes, over a fading wireless medium, in the presence of a passive eavesdropper. We propose a scheme that provides security based on transforming the basic signal constellation to a higher order signal constellation with the help of conventional encryption method and then using channel knowledge (i.e. amplitude and phase variation), which is location specific, to distort the constellation of encrypted data. This scheme not only makes the estimation of the constellation difficult but also the type of modulation that is used for the adversary. BER (bit error rate) is used as performance metric. We find that the adversary suffers from high BER as compared to its legitimate counterpart.

International Conference on Computer and Communication Engineering•May 1, 2010•7 citations

Physical Layer Security Enhancement Using an Expanded Signal Constellation

Thien-Toan Tran, Yoan Shin, Oh‐Soon Shin

We present an effective scheme for preventing eavesdropping in wireless communication systems. In the proposed scheme, the modulation scheme is designed to change based on an expanded signal constellation, in such a way that the eavesdropper cannot be aware of the change. As compared to previously proposed schemes that rely on specific relay nodes, the proposed scheme is advantageous in that it can keep the transmit messages secure without requiring any assistance of relays.

Asia-Pacific Conference on Communications (APCC)•Oct 1, 2012•1 citation
Eavesdropping in wireless communication environment should be suppressed. However, most existing schemes ordinarily focus on secrecy rate enhancement, which may not be achieved with the non-Gaussian signals. Therefore, we consider this security problem from the actual signal point of view. On the basis of this premise, a novel scheme is proposed. In our scheme, each original signal in one constellation is converted as a transmitted signal in another constellation, and the principle of this variation can be safely told to the user without being learned by others. With this conversion, the eavesdropper is difficult to restore the original signals. Performance analysis and simulation results illustrate that the proposed scheme is efficient for physical layer security improvement.
We propose a novel physical layer scheme to suppress eavesdropping. Different from the existing schemes which are based on secrecy rate enhancement with Gaussian signal, our scheme is executed from the actual signal point of view. In our scheme, we set several structures of constellations for each modulation mode, and then different structures are utilized for different signals' modulations. In this case, on one hand, even though the eavesdropper knows this modulation mode, he#x002F;she is difficult to demodulate each signal. On the other hand, the information related to this constellation selection is safely delivered to the authorized user by a well-designed mechanism. Moreover, an auxiliary artificial interference method is introduced for further confusing the eavesdropper. In a word, our scheme is feasible for physical layer security improvement.
In this paper, a hybrid scheme to provide wireless physical layer security based on encryption and wireless channel pre-compensation is presented. The physical layer security is provided by converting the signal constellation into a higher order constellation by using conventional encryption (symmetric key encryption) and then using channel state information (i.e. amplitude and phase variation), which is location specific, to further encrypt the constellation before transmission. Since detection and demodulation are based upon the known signal constellation, which is not known in advance in our case, it becomes difficult for the eavesdropper to determine the original signal constellation. The data intercepted by the eavesdropper is unintelligible due to the combined effect of encryption and pre-compensation. Using bit error rate (BER) as performance metric, it is found that the eavesdropper suffers from high BER as compared to its legitimate counterpart hence providing secure communication. The developed scheme was tested with existing wireless communication standard IEEE 802.11 to show the practical application of the scheme.
Non-orthogonal multiple access (NOMA) is an important multiple access mode in 5G. Nevertheless, eavesdropping may appear between the users in NOMA. In this case, physical layer security schemes can be introduced to combat eavesdropping. Different from the existing schemes, eavesdropping suppression in NOMA should be based on several rules: (i) successive interference cancellation (SIC) should be normally operated; (ii) each user can not attain others' privacy information; (iii) each adopted scheme had better not to depend on the spatial disparity between channels (since the channels may have the strong spatial similarity). Therefore, we propose a novel scheme to adapt to these rules. In our scheme, the original signals of users are separately transformed into the transmitted signals by a well-designed angle conversion method, and the principles of these variations for diverse users are different. Furthermore, an auxiliary mechanism with full-duplex technology is devised to guarantee the users to safely learn the principles, respectively. Through this scheme, each user can deduce other users' transmitted signals for SIC, while the original signals are difficult to be determined from transmitted signals. Hence, our scheme can effectively improve security.
Security is a critical element in the design of communication systems. However, despite its essential role in enabling low-cost implementations and robust theoretical foundations, physical layer security is often overlooked in developing countermeasures against eavesdropping. In this work, we propose practical physical-layer countermeasures that enhance secrecy with low computational overhead. Our approach decomposes the constellation diagram using basis vectors, constructing the original message symbol in the main lobe aimed at the intended receiver, while projecting randomized constellation points in other directions to mislead potential eavesdroppers. When the eavesdropper’s location is known, we use static basis vectors, achieving a higher level of secrecy in that direction. When the location is unknown, we dynamically change the basis vectors to provide information-theoretic security in all directions through basis vector randomization. This design enables the intended receiver to operate without knowledge of the basis vectors, reducing receiver overhead. We evaluate the scheme’s secrecy performance through bit error rate and secrecy rate analyses, demonstrating its potential to improve physical layer security.
In this paper we consider the problem of secure communication between two nodes, over a fading wireless medium, in the presence of a passive eavesdropper. We propose a scheme that provides security based on transforming the basic signal constellation to a higher order signal constellation with the help of conventional encryption method and then using channel knowledge (i.e. amplitude and phase variation), which is location specific, to distort the constellation of encrypted data. This scheme not only makes the estimation of the constellation difficult but also the type of modulation that is used for the adversary. BER (bit error rate) is used as performance metric. We find that the adversary suffers from high BER as compared to its legitimate counterpart.