5G security domains and trust model

Why 5G Needs a New Security Framework

5G introduces a fundamentally different network architecture compared to 4G. It is service-based, cloud-native, and designed to support verticals ranging from autonomous vehicles to remote surgery. This diversity of use cases demands a comprehensive security framework that goes well beyond what 4G offered. 3GPP addressed this in TS 33.501, which defines the 5G security architecture. Rather than a single monolithic security layer, the specification organizes protection into five distinct security domains, each covering a specific part of the system with its own trust boundaries, threat models,…