Volume 21, Issue 3 (JIAEEE Vol.21 No.3 2024)
Journal of Iranian Association of Electrical and Electronics Engineers 2024, 21(3): 47-58 |
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Keshavarzi M, Kuhestani A. Performance Analysis of Physical Layer Key Generation Relying on Discrete Random Phase Injection. Journal of Iranian Association of Electrical and Electronics Engineers 2024; 21 (3) :47-58
URL: http://jiaeee.com/article-1-1640-en.html
URL: http://jiaeee.com/article-1-1640-en.html
Faculty of Electrical and Computer Engineering, Qom University of Technology
Abstract: (1073 Views)
Among physical layer security schemes, secret key generation schemes are efficient for sixth generation (6G) networks due to their desirable features and capabilities. In particular, schemes based on local random generators can be used to generate secret keys at a high rate. One of these schemes is the random phase injection scheme, in which the channel probe signals with random phase are exchanged between the communication parties (Alice and Bob). In this paper, a key generation scheme based on sending channel probe signals with discrete random phase and for peer to peer communications is presented. While introducing the quantization methods, the simple and practical "quantization with guard band (GB)" scheme is used for key extraction. Also, contrary to many studies, we assume that the legal channel suffers from weak channel reciprocity and noise also affects the received phase of Alice and Bob. For such a scenario, we provide expressions for the key mismatch rate (KMR) as well as the key discarding rate (KDR) per channel probe. Although increasing the GB range decreases the KMR metric, the length of the raw key sequence also shortens. In order to evaluate the effect of GB on the efficiency of the proposed key generation scheme, the raw key generation rate is defined and calculated. The simulation results confirm the analytical results and are useful for determining the power of the probe signal and the GB domain.
Keywords: Physical layer secret key generation, discrete random phase injection, guard bands, key disagreement rate, key discarding rate.
Type of Article: Research |
Subject:
Communication
Received: 2023/09/13 | Accepted: 2023/11/6 | Published: 2024/11/2
Received: 2023/09/13 | Accepted: 2023/11/6 | Published: 2024/11/2
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