S-NSSAI (Single Network Slice Selection Assistance Information)
Also known as: Single Network Slice Selection Assistance Information
An S-NSSAI is the identifier of a single 5G network slice, composed of a Slice/Service Type (SST) and an optional Slice Differentiator (SD). UEs signal Requested S-NSSAIs during registration; the network returns Allowed S-NSSAIs based on subscription and roaming agreements. S-NSSAI values are the primary key that ties a subscriber to a slice instance.
S-NSSAI in context
To place S-NSSAI in the wider telecom-security picture, review Slice Security, SUPI, SS7 Message Categories, Network Slicing, Slice Isolation (5G) and Slice Hopping.
Related terms
Equipment
5G SBA control (NRF, SCP, NSSF, BSF, NWDAF)
Related topic hubs
- Roaming Security IPX/GRX interconnect risk, home-routed vs local-breakout, SEPP.
- 5G Security 5G SBA, SEPP, SUCI, 5G-AKA, N32 and service-based interface security.
- 5G NEF Security Network Exposure Function security in the 5G core.
- 5G Penetration Testing Pentesting the 5G core, SBA, SEPP, and gNB interfaces.
More from the TelcoSec Glossary
Browse the full TelcoSec Glossary, the Ultimate Guide to Mobile Network Security, or the P1 Arsenal of telecom-security tools.