• • • DEFENCE TECHNOLOGY • • •
SECURING THE DATA
LAYER IN SOFTWARE-DEFINED DEFENCE SYSTEMS
BY JASON WILKES, SALES DIRECTOR EMEA, TUXERA
odern defence platforms are increasingly software-defined. From autonomous ground vehicles and naval systems to airborne ISR platforms and secure communications infrastructure, mission performance now depends on software reliability. In systems expected to operate for 20+ years under harsh conditions, data integrity and secure lifecycle management have become strategic concerns. Engineers should prioritise storage architectures that ensure predictable recovery, controlled flash wear, and secure lifecycle management from day one.
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The shift to software-defined architectures
Defence programmes are adopting modular, software-driven architectures to improve flexibility and reduce validation effort. However, this shift also increases reliance on shared storage, encrypted communications, and configuration data. The volume of data processed at the edge continues to rise. Sensor fusion, AI-assisted decision support, encrypted telemetry, and remote updates depend on reliable local storage. Unlike commercial devices, defence systems often operate in environments where power interruptions, extreme temperatures, radiation exposure and physical inaccessibility are the norm.
Data integrity under
hostile conditions Flash memory remains the dominant storage medium in embedded systems due to its compact form factor and shock resistance. However, flash has finite endurance, is sensitive to write patterns, and behaves differently under repeated power interruptions.
Space and high-altitude platforms may require radiation-hardened flash, which can cost significantly more than commercial alternatives. In remote or battlefield environments, systems must
32 ELECTRICAL ENGINEERING •MARCH 2026
tolerate abrupt shutdowns without physical servicing. Silent data corruption creates risks. Unlike obvious hardware failures, corrupted logs, configuration data, or firmware images may only reveal themselves under specific operational conditions. A failed update, corrupted key store, or inconsistent recovery after reboot can degrade system functionality long before the root cause is identified.
Ensuring data integrity requires predictable
recovery behaviour, controlled write amplification, and long-term flash endurance planning aligned with expected operational profiles.
Rising cybersecurity expectations
Cybersecurity requirements for defence electronics are growing. Secure boot chains, encrypted storage, authenticated communications and cryptographic key management are no longer optional. Regulatory bodies and defence alliances are placing increasing emphasis on lifecycle security management. Requirements around key rotation, vulnerability remediation and auditability extend beyond initial deployment and into long-term operational support. For embedded platforms, this introduces additional complexity at the storage layer. Encryption keys, certificates and firmware images must be stored securely and updated safely. A storage subsystem that cannot guarantee atomic updates or predictable recovery can undermine higher-level security controls.
The convergence of operational technology (OT) and information technology (IT) domains further expands the attack surface. As defence systems integrate with broader digital ecosystems, embedded networking stacks and storage mechanisms must support encrypted, low-latency communication without compromising determinism.
Lifecycle assurance and
programme risk Defence platforms often remain in service for decades, often through multiple upgrade cycles and evolving regulatory frameworks. Software components selected early in a programme can
define maintenance requirements and support costs long after deployment. In addition, compliance and recertification cycles will continue for years after initial deployment.
Flash storage decisions also affect the cost of programmes. Overprovisioning memory to compensate for wear or instability increases bill-of- materials costs. Designing storage architectures that minimise unnecessary writes, manage wear proactively and recover consistently after faults can significantly reduce long-term operational risk.
Preparing for the next generation
of defence electronics Emerging technologies such as edge AI, distributed sensor networks and software-defined radios will further increase data volumes and processing intensity at the edge. 5G-enabled tactical networks and autonomous systems demand real-time, encrypted data exchange with minimal latency.
These trends place new pressure on embedded storage subsystems. High-bandwidth logging, secure updates and mixed-criticality workloads require architectures that treat storage as mission infrastructure rather than peripheral hardware. To meet these demands, defence engineers should focus on:
• Predictable behaviour under repeated power interruption
• Flash endurance modelling aligned with operational lifetimes
• Secure key and firmware storage mechanisms • Compliance readiness for evolving cybersecurity and safety standards
• Long-term vendor and documentation support In modern defence systems, compute
performance and advanced algorithms often capture attention. However, those capabilities ultimately rely on trusted data. As platforms become increasingly software- defined, the integrity and security of the embedded data layer will play a decisive role in mission assurance. Designing for resilience at that foundation is a strategic necessity.
https://www.tuxera.com
electricalengineeringmagazine.co.uk
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