Secure and Efficient OTA Updates for Connected Vehicles: A Systems Engineering Approach

As vehicles become increasingly software-defined, Over-the-Air (OTA) update platforms have emerged as critical infrastructure for deploying software patches, feature enhancements, and security updates remotely. However, enabling secure, reliable, and bandwidth-efficient OTA updates presents significant technical and architectural challenges—especially in systems that govern safety-critical functions. This article presents a systems engineering approach to the design of secure and efficient OTA frameworks for connected vehicles. Drawing upon case studies from automotive OEMs and simulations of in-vehicle networks, the article analyzes attack surfaces, latency constraints, and resource limitations. A novel multi-layered OTA update architecture is proposed, integrating encrypted firmware distribution, in-transit authentication, ECU-level validation, delta encoding, and redundancy-based rollback. By aligning cybersecurity, embedded systems, and vehicle diagnostics under a unified OTA pipeline, this work contributes to a scalable, OEM-agnostic solution for secure vehicle software lifecycle management.