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J K Tugnait - One of the best experts on this subject based on the ideXlab platform.

  • on mitigation of active Eavesdropping Attack by spoofing relay
    Vehicular Technology Conference, 2017
    Co-Authors: J K Tugnait
    Abstract:

    We consider detection of spoofing relay Attack in time-division duplex (TDD) multiple antenna systems where an adversary operating in a full-duplex mode, amplifies and forwards the training signal of the legitimate receiver. In TDD systems, the channel state information (CSI) can be acquired using reverse training. The spoofing relay Attack contaminates the channel estimation phase. Consequently the beamformer designed using the contaminated channel estimate can lead to a significant information leakage to the Attacking adversary. A recent approach proposed using the minimum description length (MDL) criterion to detect spoofing relay Attack. In this paper we augment this approach with joint channel estimation and secure beamforming to mitigate the effects of pilot contamination by spoofing relay. The proposed mitigation approach is illustrated via simulations.

  • VTC Spring - On Mitigation of Active Eavesdropping Attack by Spoofing Relay
    2017 IEEE 85th Vehicular Technology Conference (VTC Spring), 2017
    Co-Authors: J K Tugnait
    Abstract:

    We consider detection of spoofing relay Attack in time-division duplex (TDD) multiple antenna systems where an adversary operating in a full-duplex mode, amplifies and forwards the training signal of the legitimate receiver. In TDD systems, the channel state information (CSI) can be acquired using reverse training. The spoofing relay Attack contaminates the channel estimation phase. Consequently the beamformer designed using the contaminated channel estimate can lead to a significant information leakage to the Attacking adversary. A recent approach proposed using the minimum description length (MDL) criterion to detect spoofing relay Attack. In this paper we augment this approach with joint channel estimation and secure beamforming to mitigate the effects of pilot contamination by spoofing relay. The proposed mitigation approach is illustrated via simulations.

  • detection of active Eavesdropping Attack by spoofing relay in multiple antenna systems
    IEEE Wireless Communications Letters, 2016
    Co-Authors: J K Tugnait
    Abstract:

    We consider detection of spoofing relay Attack in time-division duplex (TDD) multiple antenna systems where an adversary operating in a full-duplex mode, amplifies and forwards the training signal of the legitimate receiver. In TDD systems, the channel state information can be acquired using reverse training. The spoofing relay Attack contaminates the channel estimation phase. Consequently, the beamformer designed using the contaminated channel estimate can lead to a significant information leakage to the Attacking adversary. We propose use of the minimum description length source enumeration method based on the data correlation matrix to detect spoofing relay Attack exploiting the receiver noise of the spoofing relay. The proposed method is analyzed and its detection performance is illustrated via simulations.

Marc Aßmann - One of the best experts on this subject based on the ideXlab platform.

Sheng Zhong - One of the best experts on this subject based on the ideXlab platform.

  • Secure TDD MIMO Networks Against Training Sequence Based Eavesdropping Attack
    IEEE Transactions on Mobile Computing, 2020
    Co-Authors: Yunlong Mao, Yuan Zhang, Jingyu Hua, Sheng Zhong
    Abstract:

    Multi-User MIMO (MU-MIMO) has attracted much attention due to its significant advantage of increasing the utilization ratio of wireless channels. However, Frequency-Division Duplex (FDD) systems are vulnerable to Eavesdropping, since the explicit CSI feedback can be manipulated. In this paper, we show that Time-Division Duplex (TDD) systems are insecure as well. In particular, we show that it is possible to eavesdrop on other users’ downloads by tuning training sequences. In order to defend MU-MIMO against such threats, we propose a secure CSI estimation scheme, which can provide correct estimates of CSI when adversarial users are in presence. We prove that our scheme is secure against training sequence based Eavesdropping Attack. We have implemented our scheme for TDD MU-MIMO systems and performed a series of experiments. Results demonstrate that our secure CSI estimation scheme is highly effective in protecting TDD MIMO networks against Eavesdropping Attack. Furthermore, we extend our scheme to support massive MU-MIMO networks, with a carefully redesigned uplink protocol and optimized power allocation to achieve higher spectral efficiency. To be more practical, we also take mismatch channel issue into our consideration. An enhancement scheme is proposed and we show that our scheme with enhancement is secure and correct under mismatch channel.

  • ACM Conference on Computer and Communications Security - Stemming Downlink Leakage from Training Sequences in Multi-User MIMO Networks
    Proceedings of the 2016 ACM SIGSAC Conference on Computer and Communications Security, 2016
    Co-Authors: Yunlong Mao, Yuan Zhang, Sheng Zhong
    Abstract:

    Multi-User MIMO has attracted much attention due to its significant advantage of increasing the utilization ratio of wireless channels. Recently a serious Eavesdropping Attack, which exploits the CSI feedback of the FDD system, is discovered in MU-MIMO networks. In this paper, we firstly show a similar Eavesdropping Attack for the TDD system is also possible by proposing a novel, feasible Attack approach. Following it, a malicious user can eavesdrop on other users' downloads by transforming training sequences. To prevent this Attack, we propose a secure CSI estimation scheme for instantaneous CSI. Furthermore, we extend this scheme to achieve adaptive security when CSI is relatively statistical. We have implemented our scheme for both uplink and downlink of MU-MIMO and performed a series of experiments. Results show that our secure CSI estimation scheme is highly effective in preventing downlink leakage against malicious users.

Weiming Shen - One of the best experts on this subject based on the ideXlab platform.

  • Eavesdropping Attack in collaborative wireless networks: Security protocols and intercept behavior
    Proceedings of the 2013 IEEE 17th International Conference on Computer Supported Cooperative Work in Design (CSCWD), 2013
    Co-Authors: Xianbin Wang, Weiming Shen
    Abstract:

    In this paper, we investigate security issues in a collaborative wireless network in the presence of Eavesdropping Attacks, where multiple amplify-and-forward (AF) relays are exploited to secure the message transmission between legitimate users. We first consider the multiple AF relays all participating in assisting the transmission from source to destination, which is called all-relay based collaborative transmission scheme as denoted by all-relay scheme for notational convenience. We also propose the best-relay transmission scheme in which only the single “best” relay is selected to help the source transmit messages to destination. We then analyze the intercept behavior in wireless networks and evaluate intercept probabilities of the proposed all-relay and best-relay schemes as well as the conventional direct transmission without relay in a Rayleigh fading environment. Numerical results show that the best-relay transmission scheme always outperforms the all-relay and direct transmission schemes in terms of intercept probability. It is also shown that as the number of eavesdroppers increases, the intercept probabilities of both all-relay and best-relay schemes increase. Moreover, the intercept probability performance of all-relay and best-relay schemes significantly improves with an increasing number of relays, implying the advantage of exploiting multiple relays against Eavesdropping Attacks.

  • CSCWD - Eavesdropping Attack in collaborative wireless networks: Security protocols and intercept behavior
    Proceedings of the 2013 IEEE 17th International Conference on Computer Supported Cooperative Work in Design (CSCWD), 2013
    Co-Authors: Xianbin Wang, Weiming Shen
    Abstract:

    In this paper, we investigate security issues in a collaborative wireless network in the presence of Eavesdropping Attacks, where multiple amplify-and-forward (AF) relays are exploited to secure the message transmission between legitimate users. We first consider the multiple AF relays all participating in assisting the transmission from source to destination, which is called all-relay based collaborative transmission scheme as denoted by all-relay scheme for notational convenience. We also propose the best-relay transmission scheme in which only the single “best” relay is selected to help the source transmit messages to destination. We then analyze the intercept behavior in wireless networks and evaluate intercept probabilities of the proposed all-relay and best-relay schemes as well as the conventional direct transmission without relay in a Rayleigh fading environment. Numerical results show that the best-relay transmission scheme always outperforms the all-relay and direct transmission schemes in terms of intercept probability. It is also shown that as the number of eavesdroppers increases, the intercept probabilities of both all-relay and best-relay schemes increase. Moreover, the intercept probability performance of all-relay and best-relay schemes significantly improves with an increasing number of relays, implying the advantage of exploiting multiple relays against Eavesdropping Attacks.

  • intercept probability analysis of cooperative wireless networks with best relay selection in the presence of Eavesdropping Attack
    arXiv: Information Theory, 2013
    Co-Authors: Yu Long Zou, Xianbin Wang, Weiming Shen
    Abstract:

    Due to the broadcast nature of wireless medium, wireless communication is extremely vulnerable to Eavesdropping Attack. Physical-layer security is emerging as a new paradigm to prevent the eavesdropper from interception by exploiting the physical characteristics of wireless channels, which has recently attracted a lot of research attentions. In this paper, we consider the physical-layer security in cooperative wireless networks with multiple decode-and-forward (DF) relays and investigate the best relay selection in the presence of Eavesdropping Attack. For the comparison purpose, we also examine the conventional direct transmission without relay and traditional max-min relay selection. We derive closed-form intercept probability expressions of the direct transmission, traditional max-min relay selection, and proposed best relay selection schemes in Rayleigh fading channels. Numerical results show that the proposed best relay selection scheme strictly outperforms the traditional direct transmission and max-min relay selection schemes in terms of intercept probability. In addition, as the number of relays increases, the intercept probabilities of both traditional max-min relay selection and proposed best relay selection schemes decrease significantly, showing the advantage of exploiting multiple relays against Eavesdropping Attack.

  • Optimal relay selection for physical-layer security in cooperative wireless networks
    IEEE Journal on Selected Areas in Communications, 2013
    Co-Authors: Yu Long Zou, Xianbin Wang, Weiming Shen
    Abstract:

    In this paper, we explore the physical-layer security in cooperative wireless networks with multiple relays where both amplify-and-forward (AF) and decode-and-forward (DF) protocols are considered. We propose the AF and DF based optimal relay selection (i.e., AFbORS and DFbORS) schemes to improve the wireless security against Eavesdropping Attack. For the purpose of comparison, we examine the traditional AFbORS and DFbORS schemes, denoted by T-AFbORS and T- DFbORS, respectively. We also investigate a so-called multiple relay combining (MRC) framework and present the traditional AF and DF based MRC schemes, called T-AFbMRC and T- DFbMRC, where multiple relays participate in forwarding the source signal to destination which then combines its received signals from the multiple relays. We derive closed-form intercept probability expressions of the proposed AFbORS and DFbORS (i.e., P-AFbORS and P-DFbORS) as well as the T-AFbORS, T- DFbORS, T-AFbMRC and T-DFbMRC schemes in the presence of Eavesdropping Attack. We further conduct an asymptotic intercept probability analysis to evaluate the diversity order performance of relay selection schemes and show that no matter which relaying protocol is considered (i.e., AF and DF), the traditional and proposed optimal relay selection approaches both achieve the diversity order M where M represents the number of relays. In addition, numerical results show that for both AF and DF protocols, the intercept probability performance of proposed optimal relay selection is strictly better than that of the traditional relay selection and multiple relay combiningmethods.

Johannes Thewes - One of the best experts on this subject based on the ideXlab platform.