Unified and Certifiable Cybersecurity Management Framework for IVHM

Commercial and military aircraft’s are increasingly rely on Integrated Vehicle Health Management (IVHM) as a critical enabler for predictive maintenance, operational efficiency, and mission availability. The evolution of IVHM data communication architecture- from legacy wire-based networks to wireless based architecture, involving onboard wireless sensor networks (WSN) and IP-based air-to ground communication networks, including satellite-enabled data links – introduces and expand multi domain, multi channel cyber-physical attack surfaces that challenge both functional, operational safety and continued airworthiness. DO-326A/ED-202A and DO-356A/ED-203A standards define aviation cybersecurity requirements within a safety-driven assurance context, and IEC 62443 standard offers a defense-in-depth, lifecycle-based control framework for industrial systems. A unified approach by mapping and harmonizing the complimentary aspects of these two standards has the potential to simplify and expedite the security assurance certification process for the IVHM and other digital avionic systems. This paper presents a unified, standards-aligned cybersecurity assurance framework for aircraft IVHM systems. It establishes a traceable and repeatable cross-domain mapping between IEC 62443 foundational and system requirements and the DO-326A assurance objectives, enabling bidirectional traceability from Security Levels (SL) to their corresponding Security Assurance Levels (SAL). The architecture is decomposed into zone-and-conduit structures that allocate Security Level-Targets (SL-T) and verify Security Levels-Achieved (SL-A) across assets, interfaces, and data flows. The framework is architected to facilitate the generation of certifiable artefacts, including compliance matrices, test evidence, and traceability reports. A scenario-driven risk assessment that employs Bayesian inference and attack-tree modeling is performed on reference architecture to demonstrate the efficacy of the proposed framework in improving the IVHM system security assurance and certification process efficiency in terms of effort, time and cost. Guidelines for aircraft and equipment manufacturers to deploy the proposed framework are outlined. The paper concludes with the recommendations for incorporating the cybersecurity certification aspects discussed in this paper in the industry standards for IVHM and digital avionic systems.