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Private 5G networks utilise network slicing to provide customisable, low-latency, and high-bandwidth services for enterprise operations. However, managing security across multiple slices creates significant challenges in maintaining isolation and resilience. Applying Zero Trust Network Access principles establishes a framework based on continuous verification and least-privilege access rather than assumed trust. Within multi-slice environments, this approach employs software-defined perimeters, artificial intelligence for anomaly detection, and policy-based segmentation to protect against insider threats and unauthorised lateral movement. It also addresses the complexities of dynamic endpoint authentication across heterogeneous operational slices. By examining existing industry standards, architectural blueprints, and practical deployment models, the analysis outlines the critical trade-offs between performance, scalability, and regulatory compliance necessary for embedding zero trust security deeply into private enterprise 5G networks.
Modern enterprises increasingly rely on private 5G networks to connect vital infrastructure and devices. As network slicing splits single networks into custom virtual segments, traditional perimeter security becomes insufficient. Establishing continuous verification across all network slices ensures that compromised credentials or insider threats cannot easily navigate between different corporate systems, protecting critical business data and operations from disruption.
This conceptual review focuses on architectural blueprints and implementation frameworks for enterprise network security. The primary users are operators of private 5G networks and enterprise security architects seeking to secure multi-slice deployments. Because the work is a review of industry standards and deployment models rather than an evaluated technological prototype, it sits at an early, architectural planning stage of practical application.
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The evolution of 5G technology and the proliferation of network slicing have revolutionized private enterprise deployments by offering customizable, low-latency, and high-bandwidth services tailored to diverse operational needs. However, this paradigm introduces complex security challenges, particularly in maintaining isolated, resilient, and trustworthy network environments across multiple slices. This review explores the integration of Zero Trust Network Access (ZTNA) principles within multi-slice 5G architectures to fortify enterprise security postures. Emphasizing a “never trust, always verify” model, the paper critically evaluates how ZTNA frameworks enforce least privilege access, continuous identity verification, and adaptive threat detection across heterogeneous network slices. The discussion extends to the interplay between software-defined perimeters, AI-enhanced anomaly detection, and policy-based segmentation to address insider threats, lateral movement, and dynamic endpoint authentication. The paper reviews current industry standards, architectural blueprints, and practical deployment scenarios, shedding light on scalability, performance trade-offs, and regulatory compliance. Ultimately, this study provides a forward-looking perspective on embedding ZTNA into the DNA of 5G private networks to ensure secure, reliable, and agile enterprise operations.
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DOI: 10.38124/ijisrt/25aug323
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