面向物聯(lián)網(wǎng)準(zhǔn)靜態(tài)信道的中繼協(xié)作密鑰生成方法

肖帥芳; 郭云飛; 白慧卿; 金梁; 黃開枝

doi:10.11999/JEIT170384

面向物聯(lián)網(wǎng)準(zhǔn)靜態(tài)信道的中繼協(xié)作密鑰生成方法

doi: 10.11999/JEIT170384

基金項(xiàng)目:

國家自然科學(xué)基金(61379006)，國家863計(jì)劃項(xiàng)目(2015AA01A708)，國家自然科學(xué)基金創(chuàng)新群體項(xiàng)目(61521003)

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出版歷程
- 收稿日期: 2017-04-26
- 修回日期: 2017-09-11
- 刊出日期: 2018-01-19

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

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)

摘要

摘要: 針對(duì)物聯(lián)網(wǎng)準(zhǔn)靜態(tài)信道下密鑰生成速率低的問題，該文提出一種基于中繼節(jié)點(diǎn)協(xié)作的密鑰生成方法。首先，通信雙方通過信道估計(jì)獲得直達(dá)信道和部分中繼信道信息；然后，中繼節(jié)點(diǎn)采用網(wǎng)絡(luò)編碼技術(shù)參與協(xié)作，使得通信雙方獲取全部中繼信道信息；最后，通信雙方在直達(dá)信道上進(jìn)行密鑰協(xié)商，利用直達(dá)信道信息、中繼信道信息與協(xié)商信息共同生成相同的密鑰。安全性分析表明該方法能夠提高可達(dá)密鑰速率，并且隨著信噪比的提高，可達(dá)密鑰速率呈線性增長，趨于最優(yōu)值。蒙特卡洛仿真驗(yàn)證了理論分析的結(jié)果，并得出了增加中繼節(jié)點(diǎn)數(shù)量、選取信道變化幅度大的中繼節(jié)點(diǎn)，可以進(jìn)一步提高可達(dá)密鑰速率。
- 物理層安全 /
- 密鑰生成 /
- 物聯(lián)網(wǎng) /
- 中繼協(xié)作
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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參考文獻(xiàn)(17)

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