NB-IoT 기반 스마트 항로표지 시스템을 위한 LTE 보안 메커니즘 및 상호 인증 구조 분석

초록

his paper argues that a thorough understanding and application of the LTE security mechanisms underlying NB-IoT are essential for the stable operation of smart navigation aid systems. The core EPS AKA procedure utilizes a mutual authentication structure, where the terminal and the network verify each other rather than relying on unidirectional authentication, thereby fundamentally blocking hacking threats through spoofed base stations. In particular, the method of generating the top-level key ($K_{ASME}$) independently by the terminal and the network without exposing it to the wireless segment within the key management system—which is the core of security—demonstrates the security of modern cryptography. Furthermore, managing the communication layer by separating it into NAS (Non-Access Stratum) and AS (Access Stratum) offers a powerful structural advantage that allows for the localization of damage in the event of a security incident. By preventing tampering with mobility management and session control messages through NAS security, and encrypting actual maritime data and wireless control signals through AS security, the reliability of smart navigation aids can be ensured.

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