Shared Secret Key Generation by Exploiting Inaudible Acoustic Channels

Lu, Youjing1; Wu, Fan1; Huang, Qianyi2,3; Tang, Shaojie4; Kong, Linghe1; Chen, Guihai1

2022-02-01

10.1145/3480461

ACM Transactions on Sensor Networks   影响因子和分区

1550-4859

1550-4867

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%.

Key extraction inaudible acoustic signal channel estimation

SCI

英语

非南科大

National Key R&D Program of China[2019YFB2102200] ; China NSF["62002150","62025204","62072303","61972252","61972254"] ; Key-Area Research and Development Program of Guangdong Province["2020B0101390001","2020B010164001"]

Computer Science ; Telecommunications

Computer Science, Information Systems ; Telecommunications

WOS:000841447200013

ASSOC COMPUTING MACHINERY

Web of Science

1.Shanghai Jiao Tong Univ, 800 Dongchuan Rd, Shanghai 200240, Peoples R China
2.Southern Univ Sci & Technol, Shenzhen, Peoples R China
3.Peng Cheng Lab, Shenzhen, Peoples R China
4.Univ Texas Dallas, Richardson, TX 75083 USA

Lu, Youjing,Wu, Fan,Huang, Qianyi,et al. Shared Secret Key Generation by Exploiting Inaudible Acoustic Channels[J]. ACM Transactions on Sensor Networks,2022,18(1).

Lu, Youjing,Wu, Fan,Huang, Qianyi,Tang, Shaojie,Kong, Linghe,&Chen, Guihai.(2022).Shared Secret Key Generation by Exploiting Inaudible Acoustic Channels.ACM Transactions on Sensor Networks,18(1).

Lu, Youjing,et al."Shared Secret Key Generation by Exploiting Inaudible Acoustic Channels".ACM Transactions on Sensor Networks 18.1(2022).