NB-IoT (Narrowband IoT)

Narrowband IoT (3GPP Release 13) is a low-power wide-area cellular technology designed for small, battery-powered IoT devices that send infrequent small data payloads, smart meters, asset trackers, environmental sensors. NB-IoT reuses LTE security primitives (USIM-based AKA, EEA/EIA ciphering) and operates in licensed spectrum, providing strong baseline security compared with unlicensed LPWAN alternatives.

Categories: Radio Access NetworkIdentity and SubscriberProtocols and Standards

NB-IoT in context

The radio access network is where mobile devices attach to the operator's infrastructure. Attacks in this layer include IMSI catching, rogue base stations and downgrade attacks; defenses rest on mutual authentication, integrity-protected signaling and Open RAN supply-chain hygiene.

Subscriber identifiers (IMSI, SUPI, MSISDN, IMEI) anchor authentication, charging and lawful interception. Any protocol that leaks a permanent identifier is treated as a privacy defect, which is why 5G introduced SUCI concealment on the air interface.

To place NB-IoT in the wider telecom-security picture, review ADSL, MCC, TAC, 2G, 5GNR and 6G — each entry cross-references back to this page so you can walk the topic in either direction.

Related terms

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