IEEE Consumer Electronics Magazine - January/February 2024 - 82

Special Section on Security and Privacy-Aware Emerging Computing
FIGURE 1. Network architecture of the SAGIN. The user/device segment shows the trajectory of a MU and
the changes of its location, traffic, and biometric. The ground/air/space access segment illustrates all kinds of
access entities, including BSs, high-altitude platforms, and satellites.
are intolerable for scenarios like disaster rescue
and military missions. Therefore, lightweight
and selectable authentication mechanisms are
urgently needed for these latency-sensitive
applications.
Insufficiency of Authentication Uniformity.
As mentioned before, the SAGIN is a highly heterogeneous
network supported by different communication
protocols. Each network entity in the
SAGIN encompasses a tremendous number of
IoT devices with various interfaces for control
and management, which requires a unified and
pragmatic authentication mechanism when IoT
devices access the SAGIN from different locations.
While a unified authentication framework
has been proposed for both the Third Generation
Partnership Project (3GPP) and non-3GPP
access in 3GPP and Cui et al.8,9 sensitive datarelated
authentication must be enforced to be
implemented in the core network, which mitigates
efficiency. As a result, a new unified
authentication scheme is necessary to adapt to
the heterogeneity of the SAGIN.
82
Inability to Achieve Real-time and Transparent
Authentication. The traditional cryptobased
authentication verifies the legitimacy of
IoT devices only at the beginning of login
based on a password, a personal identification
number (PIN), or a secret pattern. However,
these methods are susceptible to guessing,
video capture, and spoofing as users often
choose a simple password for convenience.
Moreover, traditional one-shot authentication
mechanisms cannot verify whether the loggedon
user is the initially authenticated one due
to a lack of physiological and behavioral biometrics.
To overcome these shortcomings,
users have to identify themselves by reentering
the password periodically, which declines
the experience and satisfaction of services. In
short, traditional authentication mechanisms
lead to either security vulnerabilities or inconvenience
for the SAGIN. To achieve privacy
protection in the background, new mechanisms
should be designed for real time and
transparent security provisioning.
IEEE Consumer Electronics Magazine

IEEE Consumer Electronics Magazine - January/February 2024

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