Book Image

IoT and OT Security Handbook

By : Smita Jain, Vasantha Lakshmi
Book Image

IoT and OT Security Handbook

By: Smita Jain, Vasantha Lakshmi

Overview of this book

The Fourth Industrial Revolution, or Industry 4.0, is all about digital transformation, manufacturing, and production. The connected world we live in today, including industries, comes with several cybersecurity challenges that need immediate attention. This book takes you through the basics of IoT and OT architecture and helps you understand and mitigate these security challenges. The book begins with an overview of the challenges faced in managing and securing IoT and OT devices in Industry 4.0. You’ll then get to grips with the Purdue model of reference architecture, which will help you explore common cyber attacks in IoT and OT environments. As you progress, you’ll be introduced to Microsoft Defender for IoT and understand its capabilities in securing IoT and OT environments. Finally, you will discover best practices for achieving continuous monitoring and vulnerability management, as well as threat monitoring and hunting, and find out how to align your business model toward zero trust. By the end of this security book, you’ll be equipped with the knowledge and skills to efficiently secure IoT and OT environments using Microsoft Defender for IoT.
Table of Contents (16 chapters)
Part 1: Understand the Challenges in IoT/OT Security and Common Attacks
Part 2: How Microsoft Defender for IoT Can Address the Open Challenges in the Connected World We Live in Today
Part 3: Best Practices to Achieve Continuous Monitoring, Vulnerability Management, Threat Monitoring and Hunting, and to Align the Business Model Toward Zero Trust
Chapter 9: Vulnerability Management and Threat Monitoring

How the Purdue model is applied to MDIoT

So far, we have delved into understanding network architectures and their topologies. Now, we will get into details of how the Purdue model (representing the OT network segmentation) in your network architecture links to MDIoT.

Let us learn about the Purdue layers that we covered in the previous chapter, Chapter 4, What Is Microsoft Defender for IoT?, in the context of MDIoT:

Figure 5.9 – The Purdue model with MDIoT

As we can see in Figure 5.9, starting from Layer 0, the layers of the Purdue model pass on information to the layers above them. Layer 0 consists of sensors and actuators, which interact with the physical environment where necessary and pass on the data to the layers above. Layer 1 consists of PLCs and RTUs. The data received from the sensors is further processed in these logical units and they provide adjusted output. Layer 1 also focuses on connecting the hardware of actuators to Layer 2.