Relay Cooperative Secret Key Generation for Quasi-static Channels in Internet of Things

XIAO Shuaifang; GUO Yunfei; BAI Huiqing; JIN Liang; HUANG Kaizhi

doi:10.11999/JEIT170384

Volume 40 Issue 1

Jan. 2018

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XIAO Shuaifang, GUO Yunfei, BAI Huiqing, JIN Liang, HUANG Kaizhi. Relay Cooperative Secret Key Generation for Quasi-static Channels in Internet of Things[J]. Journal of Electronics & Information Technology, 2018, 40(1): 50-56. doi: 10.11999/JEIT170384

Citation:

XIAO Shuaifang, GUO Yunfei, BAI Huiqing, JIN Liang, HUANG Kaizhi. Relay Cooperative Secret Key Generation for Quasi-static Channels in Internet of Things[J]. Journal of Electronics & Information Technology, 2018, 40(1): 50-56. doi: 10.11999/JEIT170384

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Relay Cooperative Secret Key Generation for Quasi-static Channels in Internet of Things

doi: 10.11999/JEIT170384

Funds:

The National Natural Science Foundation of China (61379006), The National 863 Program of China (2015AA01A708), The Science Fund for Creative Research Groups of the National Natural Science Foundation of China (61521003)

Received Date: 2017-04-26
Rev Recd Date: 2017-09-11
Publish Date: 2018-01-19

Abstract

Abstract

A secret key generation scheme based on a cooperative relay is proposed to improve the generated secret key rate for quasi-static channels in Internet of things. Firstly, the two legitimate nodes send training sequences to estimate the direct channel information, respectively. After that the relay employs network coding technique to participate the cooperation, and assists the two legitimate nodes to obtain the relay channels information. Finally, the two legitimate nodes agree on a secret key from the direct and relay channels information using the direct channel without the help of the relay. Security analysis results show that the scheme can improve the achievable secret key rate, and the achievable key rate increases linearly with SNR, approaching the optimal rate. Monte Carlo simulation verifies the security analysis results, and obtains that increasing the relay nodes, selecting the relay with a larger variance channel can further improve the achievable secret key rate.
- Physical layer security,
- Secret key generation,
- Internet of things,
- Relay cooperation

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References(17)

References

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