Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/79354
Title: Security analysis of a novel artificial randomness approach for fast key generation
Authors: Li, G
Hu, A
Zhang, J
Xiao, B 
Keywords: Artificial randomness
Physical layer security
Secret key capacity
Secret key generation
Slow fading
Issue Date: 2018
Publisher: Institute of Electrical and Electronics Engineers Inc.
Source: 2017 IEEE Global Communications Conference, GLOBECOM 2017 - Proceedings, 2018, v. 2018-January, p. 1-6 How to cite?
Abstract: Wireless key generation in slow fading channels is challenging because of the limited channel variation and randomness. This paper proposes a novel artificial randomness (AR) assisted approach for fast key generation in slow fading environments. It integrates user-designed randomness into the channel probing to form a fast-changing combined channel to realize information-theory security. The analytical expressions of secret key capacity are derived. We find that it is possible to improve secret key capacity by introducing AR when legitimate users have a better channel condition than that of eavesdropper. We also find that the improved secret key capacity is proportional to the channel probing number and is bounded by the noise variance and channel condition. Simulation and experimental results show that AR approach can generate secret key effectively in slow fading environments by carefully designing probing numbers. Compared to existing work in literature, the proposed approach does not rely on multiple antennas or extra helpers, and it can be applied in both single antenna and multi-antenna systems.
Description: 2017 IEEE Global Communications Conference, GLOBECOM 2017, Singapore, 4-8 December 2017
URI: http://hdl.handle.net/10397/79354
ISBN: 9781509050192
DOI: 10.1109/GLOCOM.2017.8254029
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