ICS Layered Threat Modeling

The ultimate goal of building cybersecurity architecture is to protect systems from potential threats that can cause imminent harm to the institution. Often, we hear a common expression in the information security world security by design, which is a deeper terminology than it looks, as it requires compiling a list of possible threats against targeted systems. Building a threat model will guide us on how to build a secure architecture and achieve the security by design concept, and this is what precisely the paper aims to explore. This paper is an intensive study to collect accurate and plausible threat models that can help to secure ICS architecture by design.