IEEE Consumer Electronics Magazine - January/February 2024 - 79

Theme Article: Special Section on Security and
Privacy-Aware Emerging Computing
AI-Oriented Two-Phase
Multifactor Authentication
in SAGINs: Prospects
and Challenges
Bin Yang, Shanyun Liu, Tao Xu, Chuyu Li,
Yongdong Zhu, and Zhifeng Zhao
Zhejiang Lab
Zipeng Li
Nanchang University
Abstract-Space-air-ground integrated networks (SAGINs), which have emerged as an
expansion of terrestrial networks, provide flexible access, ubiquitous coverage, highcapacity
backhaul, and emergency/disaster recovery for mobile users (MUs). While the
massive benefits brought by SAGIN may improve the quality of service, unauthorized
access to SAGIN entities is potentially dangerous. At present, conventional crypto-based
authentication is facing challenges, such as the inability to provide continuous and
transparent protection for MUs. In this article, we propose an AI-oriented two-phase
multifactor authentication scheme (ATMAS) by introducing intelligence to authentication.
The satellite and network control center collaborate on continuous authentication, while
unique spatial-temporal features, including service features and geographic features are
utilized to enhance the system security. Our further security analysis and performance
evaluations show that ATMAS has proper security characteristics, which can meet
various security requirements. Moreover, we shed light on lightweight and efficient
authentication mechanism design through a proper combination of spatial-temporal
factors.
Digital Object Identifier 10.1109/MCE.2023.3262904
Date ofpublication 29 March 2023; date ofcurrent version 13
October 2023.
& WITH THE PROSPERITY of the fifth-generation
(5G) mobile communication networks, the
number of 5G subscribers has already reached
January/February 2024
Published by the IEEE Consumer Technology Society
2162-2248 ß 2023 IEEE
79

IEEE Consumer Electronics Magazine - January/February 2024

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