Satellite-based Communication (SATCOM) systems are gaining renewed momentum
in Industry and Academia, thanks to innovative services introduced by leading
tech companies and the promising impact they can deliver towards the global
connectivity objective tackled by early 6G initiatives. On the one hand, the
emergence of new manufacturing processes and radio technologies promises to
reduce service costs while guaranteeing outstanding communication latency,
available bandwidth, flexibility, and coverage range. On the other hand,
cybersecurity techniques and solutions applied in SATCOM links should be
updated to reflect the enormous advancements in attacker capabilities
characterizing the last two decades. However, business urgency and
opportunities are leading operators towards challenging system trade-offs,
leading to an increased attack surface and a general relaxation of the
available security services. This paper tackles the cited problems and presents
a comprehensive survey on the security threats, solutions, and challenges faced
when deploying and operating SATCOM systems. Specifically, we classify the
literature on security for SATCOM systems into two main branches, i.e.,
physical-layer security and cryptography schemes. Then, we further identify
specific research domains for each of the identified branches, focusing on
dedicated security issues, including, e.g., physical-layer confidentiality,
anti-jamming schemes, anti-spoofing strategies, and quantum-based key
distribution schemes. For each of the above domains, we highlight the most
essential techniques, peculiarities, advantages, disadvantages, lessons
learned, and future directions. Finally, we also identify emerging research
topics whose additional investigation by Academia and Industry could further
attract researchers and investors, ultimately unleashing the potential behind
ubiquitous satellite communications.

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Author Of this post: <a href="">Pietro Tedeschi</a>, <a href="">Savio Sciancalepore</a>, <a href="">Roberto Di Pietro</a>

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