Lawful Interception

Lawful Interception 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 Lawful Interception in the wider telecom-security picture, review Lawful Interception Abuse Risk, Lawful Interception Architecture, Lawful Intercept, IAP, TCP and FCC.

Related terms

• Lawful Interception Abuse Risk
• Lawful Interception Architecture
• Lawful Intercept
• IAP
• TCP
• FCC
• RADIUS
• RTP

Equipment

Lawful interception systems (ADMF, mediation, HI1/2/3)

• ETSI TS 103 221
• HI1
• HI2
• HI3
• Lawful Intercept
• Lawful Interception Abuse Risk
• Lawful Interception Architecture
• Mediation Device (Lawful Interception)
• X1
• X2 (LI)
• All 11 terms

Articles in the P1 mobile network security guide

Related topic hubs

• SS7 Security SS7/MAP/CAP/SCCP attacks and defenses across 2G/3G interconnect.
• SS7 Penetration Testing Interconnect pentest methodology for SS7 signaling.
• Diameter Attacks S6a IDR/PUR/CLR abuse, subscriber tracking, LTE signaling attacks.
• Signaling Firewall Unified SS7/Diameter/GTP/SMS signaling firewall framework.

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.