5G Network Slicing Security: 3GPP, NESAS, and the Isolation Architecture

TS 33.501

3GPP specification defining 5G security architecture â€” the baseline for enterprise slice security

5G network slicing allows mobile network operators to provide logically isolated network segments to enterprise customers on shared physical infrastructure. 3GPP TS 33.501 defines the security architecture for 5G systems, specifying requirements for the Authentication Server Function (AUSF), Security Anchor Function (SEAF), and Unified Data Management (UDM) components. GSMA's NESAS (Network Equipment Security Assurance Scheme) provides a framework for evaluating vendor security in 5G supply chains. The engineering challenge for MNOs offering enterprise slices: ensuring that a compromise or traffic anomaly in one customer's slice cannot affect another customer's slice, while operating a cloud-native 5G core where slice boundaries are software-defined.

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