eSIM (Embedded SIM, eUICC)

eSIM (Embedded SIM, eUICC) in context

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.

Telecom security is written into standards from 3GPP, GSMA, ETSI, IETF and ITU-T. Understanding which body owns which specification, and how they interlock, is essential for both design and audit work.

To place eSIM (Embedded SIM, eUICC) in the wider telecom-security picture, review eUICC, RSP, SAS, SECA, EIR and VPN: each entry cross-references back to this page so you can walk the topic in either direction.

Related terms

• eUICC
• RSP
• SAS
• SECA
• EIR
• VPN
• E.164
• Key Management

Related topic hubs

• VoLTE Security IMS/VoLTE signaling risk: SIP, IMS-AKA, media plane attacks.
• IMS Security Training Training on IMS, VoLTE/VoNR, SIP and RCS security.
• IMSI Catcher Rogue base stations, IMSI capture and detection.
• SIM Swap Attack SIM swap fraud, port-out and account takeover risk.

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.