发表机构
LAAS-CNRS, Université de Toulouse, CNRS（图卢兹大学国家科学研究中心）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本文提出一种利用极化偏移反向散射和AES-128加密的轻量级安全机制，用于SWIPT架构中的无电池BLE传感器，在不修改整流器的情况下实现加密设备识别，实验验证了可靠性和高效性。
AI 中文摘要
本文提出了一种轻量级且协议无关的安全机制，适用于在同步无线信息和功率传输（SWIPT）架构中运行的无电池蓝牙低功耗（BLE）传感器节点。所提出的方法利用无线功率波形的极化偏移反向散射，在数据通信之前传输加密的设备标识。一个故障安全射频开关和正交极化天线被集成为外部附加模块，使得无需修改原始能量收集整流器即可实现受控反向散射。标识载荷使用AES-128加密，并以最小的能量开销传输。在无电池BLE传感器节点上的实验验证表明，能够可靠提取反向散射标识信号，与BLE广播无缝共存，并且与基于整流器的反向散射解决方案相比，提高了射频到直流的收集效率。结果证实，极化偏移反向散射识别为无电池BLE传感系统提供了有效且实用的安全性。
英文摘要
This paper presents a lightweight and protocolindependent security mechanism for battery-free Bluetooth Low Energy (BLE) sensor nodes operating in Simultaneous Wireless Information and Power Transfer (SWIPT) architecture. The proposed approach exploits polarization-shift backscattering of the wireless power wave to transmit an encrypted device identification prior to data communication. A fail-safe RF switch and orthogonally polarized antennas are integrated as an external add-on module, enabling controlled backscatter without modifying the original energy-harvesting rectifier. The identification payload is encrypted using AES-128 and transmitted with minimal energy overhead. Experimental validation on a battery-free BLE sensor node demonstrates reliable extraction of the backscattered identification signal, seamless coexistence with BLE advertising, and improved RF-to-DC harvesting efficiency compared to rectifier-based backscatter solutions. The results confirm that polarization-shift backscatter identification provides an effective and practical security for battery-free BLE sensing systems.
Journal ref2026 IEEE Wireless Power Technology Conference and Expo (WPTCE), Jul 2026, Halifax, Canada. pp.1-5
