Confidentiality

Confidentiality, one of the three pillars of the CIA security triad, is the property that information is disclosed only to parties authorised to see it. In telecom it is delivered by air-interface ciphering (EEA/NEA), TLS/IPsec on transport links, SUCI for identity protection in 5G, mTLS in the SBA, and database/disk encryption at rest in core systems.

Categories: Radio Access NetworkCore NetworkIdentity and Subscriber

Confidentiality in context

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

The mobile core is where subscriber sessions, mobility and policy live. In 4G it is the EPC (MME, HSS, S/PGW); in 5G it is the Service-Based Architecture with AMF, SMF, UPF, AUSF, UDM and the NRF. Core exposure is the difference between a single-subscriber leak and a fleet-wide breach.

To place Confidentiality in the wider telecom-security picture, review Encryption, 5G-GUTI, VoWiFi, Cryptography, CSPM and IPsec.

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Browse the full TelcoSec Glossary, the Ultimate Guide to Mobile Network Security, or the P1 Arsenal of telecom-security tools.