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  • 张小卉,张顺亮,李静.一种基于混沌理论的无线信道物理层特征密钥生成方案[J].信息安全学报,已采用    [点击复制]
  • zhangxiaohui,Zhang Shunliang,Lijing.A Chaos-Based Secret Key Generation Scheme from Phys-ical Layer Characteristics of Wireless Channel[J].Journal of Cyber Security,Accept   [点击复制]
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一种基于混沌理论的无线信道物理层特征密钥生成方案
0
(中国科学院信息工程研究所)
摘要:
由于无线通信固有的开放性和广播性,其所传输的信息极易受到攻击者的窃听。在过去的几十年间,学者们对于无线通信安全的研究主要集中于数据链路层以上,通常在数据链路层以上采用传统的加密机制。然而,传统的上层加密机制会引入较高的资源耗损。随着计算设备的计算能力和算法技术的提升,上层加密机制提供的安全性有限。作为上层加密机制的必要补充,基于信息安全理论的物理层安全技术可有效地解决这一问题。其中,混沌系统以初始值敏感性、伪随机性、遍历性等特征充分契合密码学相关特征,为无线通信物理层安全技术的实现提供了良好的解决方案。基于物理层信道特征的密钥生成技术是物理层安全技术的重要研究方向。本文充分利用混沌系统的初始值敏感性、随机性等特征,提出了基于混沌理论的物理层信道特征密钥生成方案。该方案将混沌系统作为密钥生成的扩展系统,采用OFDM系统中的信道频域响应索引生成初始密钥,并将其进行一定的数学运算转换为混沌系统的初始值。最后,由混沌系统生成用于信息加密的密钥。相关仿真结果表明,本文所提出的密钥生成方案具有良好的密钥生成速率、密钥不一致率和密钥随机性。此项研究成果为基于混沌理论的物理层信道特征密钥生成技术的应用提供了重要的理论指导。
关键词:  混沌  密钥生成  信道频域响应  安全性
DOI:
投稿时间:2022-03-17修订日期:2022-06-23
基金项目:
A Chaos-Based Secret Key Generation Scheme from Phys-ical Layer Characteristics of Wireless Channel
zhangxiaohui1, Zhang Shunliang2, Lijing2
(1.Institute of information engineering, Chinese academy of science;2.Institute of Information Engineering, Chinese Academy of Sciences)
Abstract:
The wireless communication is vulnerable to eavesdropping due to its inherent open and broadcast nature. Therefore, the security issue of the wireless communication has attracted great attention. In the past few decades, scholars mainly focus on the upper layer encryptions, and the traditional encryption mechanism is usually employed on the upper layer. How-ever, the introduced resource consumption is relatively high in the upper layer encryption. And the security provided by the upper encryption is limited with the improvement of the computing capability and algorithm technology. Faced with the problems brought by the upper layer encryption, the physical layer encryption can be a good solution. And the physi-cal layer security is based on the information security theory. It is worthy to note that the chaotic systems are featured as high sensitivity to the initial value, pseudo-randomness and ergodicity. These features conform to the relevant character-istics of cryptography, and they have provided a good solution for the physical layer security. Secret key generation from the physical layer characteristics of wireless channel is an important research direction among physical layer security technology. A chaos-based secret key generation scheme from physical characteristics of wireless channel is proposed. The characteristics of chaotic systems, such as high sensitivity to the initial value, pseudo-randomness is made full use. The chaotic system is employed as the key generation extension system. The initial keys are obtained from the indices of the channel frequency response in the OFDM system, and then they are transformed into the initial value of the chaotic system. In the end, the final keys are generated from the chaotic system. The corresponding simulation results reveal that good key generation rate, key disagreement rate and key randomness can be obtained in the proposed scheme. This re-search provides important theoretical guidance for the application of the chaos-based secret key generation from the physical layer characteristic of wireless channel.
Key words:  chaos  secret key generation  channel frequency response  security