Perimeter security measures that protect your network are not as secure as you might think. Hosts behind the firewall do not have their own protection, so access to your data center is not far away if a host in the trusted zone is compromised. This practical book introduces you to the Zero Trust model, a method that treats all hosts as if they are internet-facing and considers the entire network as compromised and hostile. In this updated edition, the authors demonstrate how Zero Trust allows you to focus on building strong authentication, authorization, and encryption while also providing compartmentalized access and improved operational agility. You will learn about the architecture of a Zero Trust network, including how to create one using currently available technologies. Explore the fundamental concepts of a Zero Trust network, including trust engines, policy engines, and context-aware agents. Understand how this model integrates security into the operation of the system rather than layering it on top. Leverage existing technologies to establish trust among actors in a network. Migrate from a perimeter-based network to a Zero Trust network in production. Examine case studies that provide insights into the Zero Trust journeys of various organizations. Learn more about the different Zero Trust architectures, standards, and frameworks.