Artificial-Noise-Aided Physical Layer Phase Challenge-Response Authentication for Practical OFDM Transmission

Xiaofu Wu, Zhen Yang, Cong Ling, Xiang Gen Xia

Research output: Contribution to journalArticlepeer-review

44 Citations (Scopus)

Abstract

In this paper, we propose a novel Artificial-Noise-Aided PHYsical layer Phase Challenge-Response Authentication Scheme (ANA-PHY-PCRAS) for practical orthogonal frequency division multiplexing (OFDM) transmission. In this new scheme, Tikhonov-distributed artificial noise is introduced to interfere with the phase-modulated key for resisting potential key-recovery attacks. Then, we address various practical issues for ANA-PHY-PCRAS with OFDM transmission, including correlation among subchannels, imperfect carrier, and timing recoveries. Among them, we show that the effect of sampling offset is significant and a search procedure in the frequency domain should be incorporated for verification. With practical OFDM transmission, the number of uncorrelated subchannels is often insufficient. Hence, we employ a time-separated approach for allocating enough subchannels, and a modified ANA-PHY-PCRAS is proposed to alleviate the discontinuity of channel phase at far-separated time slots. Finally, the key equivocation is derived for the worst case scenario. We conclude that the enhanced security of ANA-PHY-PCRAS comes from the uncertainties of both the wireless channel and introduced artificial noise, compared with the traditional challenge-response authentication scheme implemented at the upper layer.

Original languageEnglish
Article number7501833
Pages (from-to)6611-6625
Number of pages15
JournalIEEE Transactions on Wireless Communications
Volume15
Issue number10
DOIs
Publication statusPublished - Oct 2016
Externally publishedYes

Keywords

  • Authentication
  • OFDM transmission
  • information-theoretic security
  • physical layer authentication

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Wu, X., Yang, Z., Ling, C., & Xia, X. G. (2016). Artificial-Noise-Aided Physical Layer Phase Challenge-Response Authentication for Practical OFDM Transmission. IEEE Transactions on Wireless Communications, 15(10), 6611-6625. Article 7501833. https://doi.org/10.1109/TWC.2016.2586472