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A Rethink of Network Security Through Zero Trust Architecture
Abstract
The growing complexity and decentralization of modern network environments have revealed critical limitations in traditional perimeter-based security models that rely on implicit trust within network boundaries. This chapter examines Zero Trust Architecture as a transformative security paradigm that eliminates inherent trust by enforcing continuous identity verification and least-privilege access based on dynamic contextual factors. By synthesizing existing literature and comparing firewall-centric approaches with identity-driven Zero Trust frameworks, the chapter highlights the necessity of this shift in addressing contemporary threat landscapes. It further outlines an implementation roadmap that considers technical, organizational, and policy challenges associated with deploying Zero Trust across hybrid cloud, edge computing, and distributed systems. The chapter concludes with practical recommendations for security practitioners and identifies key areas for future research to advance the effectiveness and scalability of Zero Trust security models.
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