Yuliana Mike
Department of Electrical Engineering, Faculty of Electrical Technology, Institut Teknologi Sepuluh Nopember, Jalan Raya ITS, Keputih, Sukolilo, Surabaya 60111, Indonesia.
Department of Electrical Engineering, Politeknik Elektronika Negeri Surabaya (PENS), Jalan Raya ITS, Keputih, Sukolilo, Surabaya 60111, Indonesia.
Sensors (Basel). 2019 Jun 13;19(12):2674. doi: 10.3390/s19122674.
One solution to ensure secrecy in the Internet of Things (IoT) is cryptography. However, classical cryptographic systems require high computational complexity that is not appropriate for IoT devices with restricted computing resources, energy, and memory. Physical layer security that utilizes channel characteristics is an often used solution because it is simpler and more efficient than classical cryptographic systems. In this paper, we propose a signal strength exchange (SSE) system as an efficient key generation system and a synchronized quantization (SQ) method as a part of the SSE system that synchronizes data blocks in the quantization phase. The SQ method eliminates the signal pre-processing phase by performing a multi-bit conversion directly from the channel characteristics of the measurement results. Synchronization is carried out between the two authorized nodes to ensure sameness of the produced keys so it can eliminate the error-correcting phase. The test results at the IoT devices equipped with IEEE 802.11 radio show that SSE system is more efficient in terms of computing time and communication overhead than existing systems.
确保物联网（IoT）保密性的一种解决方案是加密技术。然而，传统的加密系统需要很高的计算复杂度，这对于计算资源、能量和内存受限的物联网设备来说并不适用。利用信道特性的物理层安全是一种常用的解决方案，因为它比传统加密系统更简单、更高效。在本文中，我们提出一种信号强度交换（SSE）系统作为一种高效的密钥生成系统，并提出一种同步量化（SQ）方法作为SSE系统的一部分，该方法在量化阶段同步数据块。SQ方法通过直接从测量结果的信道特性进行多位转换，消除了信号预处理阶段。在两个授权节点之间进行同步，以确保生成密钥的一致性，从而可以消除纠错阶段。在配备IEEE 802.11无线电的物联网设备上的测试结果表明，SSE系统在计算时间和通信开销方面比现有系统更高效。
