Development of a physical layer authentication scheme based on propagation characteristics in wireless communications

2023 Fiscal Year Final Research Report

• Project/Area Number: 19K20273
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 60070:Information security-related
• Research Institution: Kyushu Institute of Technology (2021-2023); Tokyo Denki University (2019-2020)
• Principal Investigator: Hirose Miyuki 九州工業大学, 大学院工学研究院, 准教授 (80804541)
• Project Period (FY): 2019-04-01 – 2024-03-31
• Keywords: 物理層セキュリティ / 電波伝搬 / 秘密鍵生成

Outline of Final Research Achievements

A theoretical investigation and experimental evaluation were conducted on key generation methods considering the transmission bandwidth, modulation scheme and number of transmitting and receiving antennas. The statistical approach permitted the assumption of various communication environments, and the effectiveness of the method was verified by calculating shared secret keys while varying the radio propagation environment and transmission parameters in a simulation-based evaluation. Furthermore, it was demonstrated that the accuracy of key generation is enhanced by increasing the sophistication of the modulation scheme and the number of transmitting and receiving antennas. The results were experimentally evaluated and compared with the theoretical predictions in several different environments, utilising a communication device with the developed cryptographic scheme implemented in an FPGA.

Free Research Field

情報セキュリティ

Academic Significance and Societal Importance of the Research Achievements

無線LANやBluetoothは市場が拡大し通信技術が発展しており、それとともに通信の安全性への要求が重要となる。物理層では通信の信頼性が重要であり安全性については余り議論されてこなかったが、本研究の成果により、秘密鍵生成方法に関する新しい視点が提供され、通信技術をセキュリティへ応用することで新たな安全性を確保の実用化に向けた重要な基盤が築かれました。