Security Analysis of Triangle Channel-Based Physical Layer Key Generation in Wireless Backscatter Communications

Li, Jiajun; Wang, Pu; Jiao, Liudan; Yan, Zheng; Zeng, Kai; Yang, Yishan

doi:10.1109/tifs.2022.3224852

Cited by 14 publications

(2 citation statements)

References 58 publications

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“…More recently, advances in generating cipher keys using radio channel properties have enabled more secure channels without relying on a common key pool such as cryptography methods [7]- [9]. However, as PLS derives its security from the very radio channel it is trying to protect, it remains sensitive to jamming, high noise, poor channel entropy or reciprocity, and poor channel estimation quality issues.…”

Section: A Review Of Cybersecuritymentioning

confidence: 99%

Control Layer Security: A New Security Paradigm for Cooperative Autonomous Systems

Guo

Wei

Villarreal

et al. 2024

IEEE Veh. Technol. Mag.

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Autonomous systems often cooperate to ensure safe navigation. Embedded within the centralised or distributed coordination mechanisms are a set of observations, unobservable states, and control variables. Security of data transfer between autonomous systems is crucial for safety, and both cryptography and physical layer security methods have been used to secure communication surfaces -each with its drawbacks and dependencies.Here, we show for the first time a new wireless Control Layer Security (CLS) mechanism. CLS exploits mutual physical states between cooperative autonomous systems to generate cipher keys. These mutual states are chosen to be observable to legitimate users and not sufficient to eavesdroppers, thereby enhancing the resulting secure capacity. The CLS cipher keys can encrypt data without key exchange or a common key pool, and offers very low information leakage. As such the security of digital data channels is now dependent on physical state estimation rather than wireless channel estimation. This protects the estimation process from wireless jamming and channel entropy dependency. We review for first time what kind of signal processing techniques are used for hidden state estimation and key generation, and the performance of CLS in different case studies.

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Section: A Review Of Cybersecuritymentioning

confidence: 99%

Control Layer Security: A New Security Paradigm for Cooperative Autonomous Systems

Guo

Wei

Villarreal

et al. 2024

IEEE Veh. Technol. Mag.

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“…In this case, two legitimate parties (e.g., Alice and Bob) are required to send public pilot sequences to each other and pursue channel estimations to acquire this common channel state information (CSI) [22], [23], which will then be passed to the key quantization [24], [25], key reconciliation [26] and privacy amplification [27] modules for key generation. However, as PL-SKG derives its security from the very radio channel it is trying to protect, it remains sensitive to jamming [28], [29], secrecy leakage [30], high noise, poor channel entropy or reciprocity, and poor channel estimation quality.…”

Section: A Review Of Cybersecuritymentioning

confidence: 99%

Control Layer Security: Exploiting Unobservable Cooperative States of Autonomous Systems for Secret Key Generation

Wei,

Guo

2024

IEEE Trans. on Mobile Comput.

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The rapid growth of autonomous systems (ASs) with data sharing means new cybersecurity methods have to be developed for them. Existing computational complexity-based cryptography does not have information-theoretical bounds and poses threats to superior computational attackers. This postquantum cryptography issue indeed motivated the rapid advances in using common physical layer properties to generate symmetrical cipher keys (known as PLS). However, PLS remains sensitive to attackers (e.g., jamming) that destroy its prerequisite wireless channel reciprocity. When ASs are in cooperative tasks (e.g., rescuing searching, and formation flight), they will behave cooperatively in the control layer. Inspired by this, we propose a new security mechanism called control layer security (CLS), which exploits the correlated but unobservable states of cooperative ASs to generate symmetrical cipher keys. This idea is then realized in the linearized UAV cooperative control scenario. The theoretical correlation coefficients between Alice's and Bob's states are computed, based on which common feature selection and key quantization steps are designed. The results from simulation and real UAV experiments show i) an approximately 90% key agreement rate is achieved, and ii) even an Eve with the known observable states and systems fails to estimate the unobservable states and the secret keys relied upon, due to the multiple-to-one mapping from unobservable states (pitch, roll and yaw angles) to the observable states (3D trajectory). This demonstrates CLS as a promising candidate to secure the communications of ASs, especially in the adversarial radio environment with attackers that destroys the prerequisite for current PLS.

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APAuth: Authenticate an Access Point by Backscatter Devices

Chang,

Li,

Yang

et al. 2024

ICC 2024 - IEEE International Conference on Communications

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Security Analysis of Triangle Channel-Based Physical Layer Key Generation in Wireless Backscatter Communications

Cited by 14 publications

References 58 publications

Control Layer Security: A New Security Paradigm for Cooperative Autonomous Systems

Control Layer Security: A New Security Paradigm for Cooperative Autonomous Systems

Control Layer Security: Exploiting Unobservable Cooperative States of Autonomous Systems for Secret Key Generation

APAuth: Authenticate an Access Point by Backscatter Devices

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