This whitepaper explains the growing shift toward Zero Trust security as organizations move away from traditional, perimeter‑based models. Legacy approaches using firewalls, IDS, IPS, and VPNs relied on a castle‑and‑moat strategy that assumed everything inside the network was trustworthy. With the rise of remote work, cloud adoption, and distributed systems, these models have shown clear limitations. Zero Trust Network Access takes a fundamentally different approach by trusting no user, device, or application by default. Instead, it enforces continuous verification, least‑privilege access, and stronger identity controls, helping organizations improve security, reduce risk, and better protect modern digital environments.

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