Roaming Security Architecture

The roaming security architecture is the end-to-end set of controls that protect signalling and user-plane traffic when a subscriber attaches to a visited network. It combines transport-layer protection (IPsec/TLS), application-layer security (SS7/Diameter firewalls, 5G SEPP with PRINS), category-based message filtering per GSMA FS.07/FS.11/FS.19, and behavioural monitoring across interconnect.

Categories: Radio Access NetworkSignalingRoaming and Interconnect

Roaming Security Architecture 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.

Signaling protocols carry the control-plane instructions that set up calls, register subscribers, hand over sessions and route SMS. SS7, Diameter, GTP-C and SIP are the four dominant families, and interconnect exposure of any of them is treated by GSMA FS.11 / FS.19 / FS.20 as a top-tier telecom risk.

To place Roaming Security Architecture in the wider telecom-security picture, review Interconnect Security Model, Inter-PLMN Security, Firewall, IBCF, VoIP and GRX.

Related terms

Related topic hubs

  • Signaling Firewall Unified SS7/Diameter/GTP/SMS signaling firewall framework.
  • SS7 Firewall GSMA FS.11 category 1/2/3 SS7 message screening at the STP edge.
  • Diameter Firewall GSMA FS.19 screening at the Diameter Edge Agent on S6a/S9/S13.
  • Roaming Security IPX/GRX interconnect risk, home-routed vs local-breakout, SEPP.

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