  For various reasons, the cloud computing paradigm is unable to meet certain
requirements (e.g. low latency and jitter, context awareness, mobility support)
that are crucial for several applications (e.g. vehicular networks, augmented
reality). To fulfil these requirements, various paradigms, such as fog
computing, mobile edge computing, and mobile cloud computing, have emerged in
recent years. While these edge paradigms share several features, most of the
existing research is compartmentalised; no synergies have been explored. This
is especially true in the field of security, where most analyses focus only on
one edge paradigm, while ignoring the others. The main goal of this study is to
holistically analyse the security threats, challenges, and mechanisms inherent
in all edge paradigms, while highlighting potential synergies and venues of
collaboration. In our results, we will show that all edge paradigms should
consider the advances in other paradigms.
