Detection and performance analysis of covert communications with disco reconfigurable intelligent surfaces for IoT

HUANG Huan; SUN Luyao; ZHANG Hongliang

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Detection and performance analysis of covert communications with disco reconfigurable intelligent surfaces for IoT

更新时间：2026-04-10

- Detection and performance analysis of covert communications with disco reconfigurable intelligent surfaces for IoT
- Chinese Journal on Internet of Things (2026)
- 作者机构：
  
  1.苏州大学电子信息学院，江苏苏州 215006
  2.北京大学电子学院，北京 100871
- 作者简介：
- 基金信息：
  
  The Key Program of the National Natural Science Foundation of China(62531008);The National Natural Science Foundation of China(62401387;62371011);The Natural Science Foundation of Jiangsu Province(BK20240768)
- DOI：
  CLC： TN915.08
- Received：22 January 2026，
  
  Revised：2026-04-08，
  
  Accepted：10 April 2026，
- 稿件说明：
移动端阅览
HUANG Huan, SUN Luyao, ZHANG Hongliang. Detection and performance analysis of covert communications with disco reconfigurable intelligent surfaces for IoT[J/OL]. Chinese Journal on Internet of Things, 2026.
DOI：

HUANG Huan, SUN Luyao, ZHANG Hongliang. Detection and performance analysis of covert communications with disco reconfigurable intelligent surfaces for IoT[J/OL]. Chinese Journal on Internet of Things, 2026. DOI：

摘要

随着物联网中敏感数据规模持续扩大，隐蔽通信因能够隐藏“通信存在”而成为重要的安全机制。在此背景下，分析了监听者Willie部署迪斯科式可重构智能超表面（DRIS

disco reconfigurable intelligent surface）条件下物联网（IoT

Internet-of-Things）隐蔽通信的检测与性能问题。由于DRIS反射系数随机时变，接收端等效信道在相干时间内不再近似恒定，从而引入主动信道老化（ACA

active channel aging）并导致信道状态信息失配。为此，设计了适用于时变DRIS的Willie检测规则；在非等概先验概率下，以总检测差错概率衡量检测性能，以信号-干扰-噪声比（SJNR

signal-to-jamming-plus-noise ratio）衡量通信性能，并推导了最优检测阈值及相关理论表达式。仿真结果表明：在发射功率为5 dBm时，相比无DRIS方案，DRIS可使Willie的总检测差错概率降低约63.4%，同时使Bob侧可达速率下降约41.9%；固定RIS虽可使可达速率提升约5.7%，但其总检测差错概率却比无DRIS方案高8.43倍。结果表明，DRIS会同时增强Willie的检测能力并破坏合法隐蔽链路，对IoT隐蔽通信构成严重安全威胁。

Abstract

With the rapid growth of sensitive data in the Internet of Things (IoT)

covert communication has become an important security mechanism by hiding the very existence of wireless transmissions. In this context

the detection and communication performance of IoT covert communications were analyzed when a disco reconfigurable intelligent surface (DRIS) was deployed by the warden Willie. Owing to the randomly time-varying reflection coefficients of the DRIS

the effective channel at the receiver was no longer approximately constant within one coherence block

thereby inducing active channel aging (ACA) and causing channel state information mismatch. To address this scenario

a detection rule for Willie tailored to time-varying DRIS-assisted channels was developed. Under non-equiprobable prior probabilities

the total detection error probability was used to characterize the detection performance

while the signal-to-jamming-plus-noise ratio (SJNR) was used to evaluate the communication performance. The optimal detection threshold and the corresponding analytical expressions were further derived. Numerical results showed that

at a transmit power of 5 dBm

compared with the no-DRIS scheme

the DRIS reduced Willie’s total detection error probability by approximately 63.4% while decreasing Bob’s achievable rate by about 41.9%. Although a fixed RIS improved the achievable rate by approximately 5.7%

its total detection error probability was 8.43 times that of the no-DRIS scheme. These results indicate that DRIS can simultaneously enhance Willie’s detection capability and impair the legitimate covert link

thereby posing a serious security threat to IoT covert communications.

关键词

Keywords

references

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