scholarly journals Intelligent Reflecting Surface Assisted Multi-User Robust Secret Key Generation for Low-Entropy Environments

Entropy ◽  
2021 ◽  
Vol 23 (10) ◽  
pp. 1342
Author(s):  
Yuwei Gao ◽  
Dengke Guo ◽  
Jun Xiong ◽  
Dongtang Ma
Keyword(s):  
Information Exchange ◽  
Generation Process ◽  
Key Generation ◽  
Secret Key ◽  
Secret Key Generation ◽  
New Material ◽  
New Research ◽  
Key Extraction ◽  
Reflecting Surface ◽  
Low Entropy

Channel secret key generation (CSKG), assisted by the new material intelligent reflecting surface (IRS), has become a new research hotspot recently. In this paper, the key extraction method in the IRS-aided low-entropy communication scenario with adjacent multi-users is investigated. Aiming at the problem of low key generation efficiency due to the high similarity of channels between users, we propose a joint user allocation and IRS reflection parameter adjustment scheme, while the reliability of information exchange during the key generation process is also considered. Specifically, the relevant key capability expressions of the IRS-aided communication system is analyzed. Then, we study how to adjust the IRS reflection matrix and allocate the corresponding users to minimize the similarity of different channels and ensure the robustness of key generation. The simulation results show that the proposed scheme can bring higher gains to the performance of key generation.

scholarly journals Secret Key Generation Assisted by Intelligent Reflecting Surface with Discrete Phase Shift in Static Environment

2020 ◽  
Author(s):  
Xiaoyan Hu ◽  
Liang Jin ◽  
Kaizhi Huang ◽  
Xiaoli Sun ◽  
You Zhou
Keyword(s):  
Channel Model ◽  
Switching Frequency ◽  
Complex Coefficient ◽  
Key Generation ◽  
Secret Key ◽  
Secret Key Generation ◽  
Channel Coefficient ◽  
Discrete Phase ◽  
Dynamic Time ◽  
Reflecting Surface

<a>Physical layer secret key generation is a promising candidate to achieve one-time-pad encryption approach for wireless communication system. The main issue of this method is the insufficient secret key rate. Especially in a static environment, the entropy of the channel complex coefficient is limited due to the lack of channel time-variation. To solve the problem, this paper proposes a novel secret key generation scheme assisted by intelligent reflecting surface (IRS) with discrete phase. We construct a dynamic time-varying channel by switching the phase of the reflection elements rapidly and randomly, and use channel estimation samples to update the secret key. Based on the common IRS channel model, we derive the expression of secret key rate. Monte Carlo simulation and numerical results show that the scheme can update secret key even if the channel coefficient is constant, and the secret key rate is higher than schemes based on artificial random signal. In addition, we comprehensively analyze the influence of various factors, such as the number of reflection elements and the IRS switching frequency on the secret key rate. </a>

Shared Secret Key Generation by Exploiting Inaudible Acoustic Channels

2022 ◽  
Vol 18 (1) ◽  
pp. 1-26
Author(s):  
Youjing Lu ◽  
Fan Wu ◽  
Qianyi Huang ◽  
Shaojie Tang ◽  
Linghe Kong ◽  
...  
Keyword(s):  
Mobile Devices ◽  
High Efficiency ◽  
Generation Rate ◽  
Key Generation ◽  
Secret Key ◽  
Secret Key Generation ◽  
Shared Secret ◽  
The Common ◽  
Core Idea ◽  
Key Extraction

To build a secure wireless networking system, it is essential that the cryptographic key is known only to the two (or more) communicating parties. Existing key extraction schemes put the devices into physical proximity and utilize the common inherent randomness between the devices to agree on a secret key, but they often rely on specialized hardware (e.g., the specific wireless NIC model) and have low bit rates. In this article, we seek a key extraction approach that only leverages off-the-shelf mobile devices, while achieving significantly higher key generation efficiency. The core idea of our approach is to exploit the fast varying inaudible acoustic channel as the common random source for key generation and wireless parallel communication for exchanging reconciliation information to improve the key generation rate. We have carefully studied and validated the feasibility of our approach through both theoretical analysis and a variety of measurements. We implement our approach on different mobile devices and conduct extensive experiments in different real scenarios. The experiment results show that our approach achieves high efficiency and satisfactory robustness. Compared with state-of-the-art methods, our approach improves the key generation rate by 38.46% and reduces the bit mismatch ratio by 42.34%.

scholarly journals Secret Key Generation Assisted by Intelligent Reflecting Surface with Discrete Phase Shift in Static Environment

2020 ◽  
Author(s):  
Xiaoyan Hu ◽  
Liang Jin ◽  
Kaizhi Huang
Keyword(s):  
Channel Model ◽  
Switching Frequency ◽  
Complex Coefficient ◽  
Key Generation ◽  
Secret Key ◽  
Secret Key Generation ◽  
Channel Coefficient ◽  
Discrete Phase ◽  
Dynamic Time ◽  
Reflecting Surface

<a>Physical layer secret key generation is a promising candidate to achieve one-time-pad encryption approach for wireless communication system. The main issue of this method is the insufficient secret key rate. Especially in a static environment, the entropy of the channel complex coefficient is limited due to the lack of channel time-variation. To solve the problem, this paper proposes a novel secret key generation scheme assisted by intelligent reflecting surface (IRS) with discrete phase. We construct a dynamic time-varying channel by switching the phase of the reflection elements rapidly and randomly, and use channel estimation samples to update the secret key. Based on the common IRS channel model, we derive the expression of secret key rate. Monte Carlo simulation and numerical results show that the scheme can update secret key even if the channel coefficient is constant, and the secret key rate is higher than schemes based on artificial random signal. In addition, we comprehensively analyze the influence of various factors, such as the number of reflection elements and the IRS switching frequency on the secret key rate. </a>

scholarly journals Secret Key Generation Assisted by Intelligent Reflecting Surface with Discrete Phase Shift in Static Environment

2020 ◽  
Author(s):  
Xiaoyan Hu ◽  
Liang Jin ◽  
Kaizhi Huang ◽  
Xiaoli Sun ◽  
You Zhou
Keyword(s):  
Channel Model ◽  
Switching Frequency ◽  
Complex Coefficient ◽  
Key Generation ◽  
Secret Key ◽  
Secret Key Generation ◽  
Channel Coefficient ◽  
Discrete Phase ◽  
Dynamic Time ◽  
Reflecting Surface

<a>Physical layer secret key generation is a promising candidate to achieve one-time-pad encryption approach for wireless communication system. The main issue of this method is the insufficient secret key rate. Especially in a static environment, the entropy of the channel complex coefficient is limited due to the lack of channel time-variation. To solve the problem, this paper proposes a novel secret key generation scheme assisted by intelligent reflecting surface (IRS) with discrete phase. We construct a dynamic time-varying channel by switching the phase of the reflection elements rapidly and randomly, and use channel estimation samples to update the secret key. Based on the common IRS channel model, we derive the expression of secret key rate. Monte Carlo simulation and numerical results show that the scheme can update secret key even if the channel coefficient is constant, and the secret key rate is higher than schemes based on artificial random signal. In addition, we comprehensively analyze the influence of various factors, such as the number of reflection elements and the IRS switching frequency on the secret key rate. </a>

scholarly journals A Lightweight Key Generation Scheme for Secure Device-to-Device (D2D) Communication

2021 ◽  
Vol 2021 ◽  
pp. 1-17
Author(s):  
Chunwei Lou ◽  
Mingsheng Cao ◽  
Rongchun Wu ◽  
Dajiang Chen ◽  
Hua Xu
Keyword(s):  
Measuring Channel ◽  
Third Party ◽  
Key Generation ◽  
Secret Key ◽  
Wireless Devices ◽  
Device To Device ◽  
Key Extraction ◽  
Cryptographic Techniques ◽  
Secret Key Extraction ◽  
Low Entropy

Key agreement is one the most essential steps when applying cryptographic techniques to secure device-to-device (D2D) communications. Recently, several PHY-based solutions have been proposed by leveraging the channel gains as a common randomness source for key extraction in wireless networks. However, these schemes usually suffer a low rate of key generation and low entropy of generated key and rely on the mobility of devices. In this paper, a novel secret key extraction protocol is proposed by using interference in wireless D2D fading channel. It establishes symmetrical keys for two wireless devices by measuring channel gains and utilizing artificial jamming sent by the third party to change the measured value of channel gains. We give a theoretically reachable key rate of the proposed scheme from the viewpoint of the information theory. It shows that the proposed scheme can make hundred times performance gain than the existing approaches theoretically. Experimental results also demonstrate that the proposed scheme can achieve a secure key distribution with a higher key rate and key entropy compared with the existing schemes.

scholarly journals CSI-based versus RSS-based Secret-Key Generation under Correlated Eavesdropping

2020 ◽  
pp. 1-1
Author(s):  
Francois Rottenberg ◽  
Trung-Hien Nguyen ◽  
Jean-Michel Dricot ◽  
Francois Horlin ◽  
Jerome Louveaux
Keyword(s):  
Key Generation ◽  
Secret Key ◽  
Secret Key Generation
Sign in / Sign up

Export Citation Format

Share Document