Physical Layer Key Generation in Wireless Networks: Challenges and Opportunities
Physical Layer Key Generation in Wireless Networks: Challenges and Opportunities
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DOI：
10.1109/mcom.2015.7120014
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发表时间：
2015-06-01
影响因子：
11.2
通讯作者：
Zeng, Kai
中科院分区：
文献类型：
--
作者：
Zeng, Kai
利用无线衰落信道的互易性和随机性的物理层密钥生成技术近年来受到了广泛的关注。虽然理论研究已经显示出其产生信息论安全密钥的潜力，但在将理论转化为实践的过程中仍然存在巨大的挑战。本文概述了物理层密钥生成过程，并讨论了其实际挑战。通过数值研究对不同的被动攻击和主动攻击进行了分析和评价。提出了一种利用随机探测信号，结合用户生成随机性和信道随机性的密钥生成方案，以对抗主动攻击。数值结果表明，在主动攻击下，该方案比使用恒定探测信号的现有方案具有更高的安全强度。讨论了物理层密钥生成的未来研究方向。
Physical layer key generation that exploits reciprocity and randomness of wireless fading channels has attracted considerable research attention in recent years. Although theoretical study has shown its potential to generate information-theoretic secure keys, great challenges remain when transforming the theory into practice. This article provides an overview of the physical layer key generation process and discusses its practical challenges. Different passive and active attacks are analyzed and evaluated through numerical study. A new key generation scheme using random probing signals, and combining user generated randomness and channel randomness, is introduced as a countermeasure against active attacks. The numerical results show that the proposed scheme achieves higher security strength than existing schemes using constant probing signals under active attacks. Future research topics on physical layer key generation are discussed.