IEEE Consumer Electronics Magazine - January/February 2024 - 89

there are still several research opportunities for
future study.
Authentication Centers Deployment. In our
proposed ATMAS, authentication is completed by
the NCC on the ground. However, this increases
transmission delays since all authentication information
must be transmitted to the NCC. To
address this, choosing MEO satellites as partial
authentication centers is a promising solution.
However, communication and computation
resources on the satellite are limited, which
requires optimization of the allocation of authentication
tasks betweenMEO satellites and the NCC.
Efficient AI-based Authentication. AI-based
authentication algorithms have intensive computation
and communication costs and require a
large amount of training data as well as a complicated
feature-extraction process.18 Besides, low
computation and communication overhead algorithms
should be investigated to the deployment
of authentication centers on satellites.
Blockchain-based Intelligent Authentication.
Blockchain is a distributed ledger technology
with characteristics of decentralization, security,
interoperation, and trust establishment.19 As the
SAGIN becomes increasingly complex, the system
may suffer from false authentications leading to
potential privacy leakage and security risks.
Blockchain-based techniques can be utilized to
track past security breaches and provide the necessary
log analysis.
ACKNOWLEDGMENTS
This work was supported in part by the National
Key Research and Development Program of
China under Grant 2020YFB1804800 and Grant
2021YFB2900200, in part by the Key Research and
Development Program of Zhejiang Province under
Grant 2021C01197, in part by the National Natural
Science Foundation of China under Grant 62101509,
in part by the Natural Science Foundation of Zhejiang
Province under Grant LQ22F010018.
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https://portal.3gpp.org/desktopmodules/Specifications/SpecificationDetails.aspx?specificationId=3169 https://portal.3gpp.org/desktopmodules/Specifications/SpecificationDetails.aspx?specificationId=3169 https://portal.3gpp.org/desktopmodules/Specifications/SpecificationDetails.aspx?specificationId=3169 https://doi.org/10.1109/TII.2022.3201971

IEEE Consumer Electronics Magazine - January/February 2024

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