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Abstract
Zero Trust for Critical Infrastructure: Policy, Architecture, and Implementation Roadmap for the Power Sector - Volume -3 | Issue - 1 | 2025, (OCT - DEC)

Pages:32-46

Category: Engineering & Technology

Published Date: 31-Dec-2025

Graphical Abstract

Dr. Jatin Patel

Keywords:

Power Sector, Cybersecurity, Zero Trust Architecture, Micro Segmentation, Identity Management, and Policy Enforcement

Abstract:
Critical infrastructure sectors such as the power grid are increasingly targeted by sophisticated cyberattacks exploiting the convergence of Information Technology (IT) and Operational Technology (OT) networks. Traditional perimeter-based security mechanisms are inadequate to address insider threats, lateral movement, and compromised remote access. This paper proposes a Zero Trust Architecture (ZTA) tailored for the power sector, integrating policy-driven access control, adaptive trust scoring, micro segmentation, and continuous verification across IT–OT environments.
The proposed framework aligns with international standards including NIST SP 800-207 [1] and IEC 62443 [2], and incorporates sector-specific regulatory requirements. A realistic simulation testbed was developed to validate the architecture using representative threat scenarios. Experimental results demonstrate an 83% reduction in unauthorized lateral movement, a 75% decrease in anomaly detection time, and a 90% improvement in mean time to revoke access (MTTRA) compared to traditional security models, while maintaining policy enforcement latency below 5 ms, ensuring operational suitability for real-time power systems.
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