Cutting-Edge Assets for Trust in 5G and Beyond: Requirements, State of the Art, Trends, and Challenges

In 5G and beyond, the figure of cross-operator/domain connections and relationships grows exponentially
among stakeholders, resources, and services, with reputation-based trust models being one of the capital
technologies leveraged for trustworthy decision-making. This work studies novel 5G assets on which trust
can be used to overcome unsuitable decision-making and address current requirements. First, it introduces
a background and general architecture of reputation-based trust models. Then, it analyzes pivotal 5G assets
on which trust can enhance their performance. In addition, this article performs a comprehensive review of
the current reputation models applied to 5G assets and compares their properties, features, techniques, and
results. Finally, it provides current trends and future challenges to conducting forthcoming research in the
area.