This eBook explains zero trust as a shift from perimeter-based security to “trust nothing, verify everything,” assuming attackers can get inside and therefore requiring continuous authentication, strict access controls, and least privilege to limit blast radius through measures like segmentation. It outlines planning steps that affect tools, policies, and staffing, then compares common implementation methodologies (device/gateway, enclave, resource portal, and sandboxing) and recommends focusing on capabilities across users, networks, applications, devices, data, infrastructure, plus visibility/analytics and automation, preferably via integrated platforms rather than point solutions. It also argues zero trust must pair prevention with strong detection and response, positioning XDR (and opt

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