Physical Layer Authentication for Non-Coherent Massive SIMO-Enabled Industrial IoT Communications

TL;DR

This paper proposes a novel physical layer authentication method for non-coherent massive SIMO IIoT systems, embedding authentication tags into messages to enhance security with low latency, outperforming traditional methods.

Contribution

It introduces a message-based tag embedding approach and optimizes power allocation, improving authentication accuracy in non-coherent massive SIMO IIoT communications.

Findings

Proposed method achieves higher authentication accuracy.

Optimized power allocation balances message and tag error performance.

Outperforms traditional uniform tag embedding with lower error floor.

Abstract

Achieving ultra-reliable, low-latency and secure communications is essential for realizing the industrial Internet of Things (IIoT). Non-coherent massive multiple-input multiple-output (MIMO) is one of promising techniques to fulfill ultra-reliable and low-latency requirements. In addition, physical layer authentication (PLA) technology is particularly suitable for secure IIoT communications thanks to its low-latency attribute. A PLA method for non-coherent massive single-input multiple-output (SIMO) IIoT communication systems is proposed in this paper. This method realizes PLA by embedding an authentication signal (tag) into a message signal, referred to as "message-based tag embedding". It is different from traditional PLA methods utilizing uniform power tags. We design the optimal tag embedding and optimize the power allocation between the message and tag signals to characterize the trade-off between the message and tag error performance. Numerical results show that the proposed message-based tag embedding PLA method is more accurate than the traditional uniform tag embedding method which has an unavoidable tag error floor close to 10%.