GSM-301Level Advanced
COURSES

GSM Security

How GSM is attacked and defended, for telecom security professionals working under authorisation. An offensive-minded course that stays within a strict ceiling: it explains attack mechanisms, named tooling and published research, and authorised-assessment methodology, then lands every topic on detection and mitigation.

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CLR-03 REQUIRED You can read every lesson in this course, but quizzes and lesson completion unlock at 6000 XP — you currently have 0 XP.
TelcoSec Academy
GSM Security Analyst
GSM-301
GSM2GSecurityRed teamIMSI catcherFalse base stationA5/1COMP128SS7MAPSignalling securityGSMA FS.11NIS2Lawful interception
Overview

GSM Security builds on GSM Fundamentals and GSM Architecture and adds the security layer those courses leave out. It opens with the GSM threat model and the authorised-assessment framework.

Learning Objectives
Describe the GSM trust model, the assumptions it was built on, and where each one breaks
Run a GSM security assessment lawfully: scoping, authorisation, a controlled range, and reporting
Explain the air interface, authentication, ciphering and identity attack surfaces as mechanisms, not recipes
Analyse the MAP and SS7 signalling attack surface and the signalling-security controls that mitigate it
Name the tools and published research used in an authorised GSM assessment and the weakness class each exercises
Design detection, monitoring and incident response for GSM threats in a mobile operator
Place GSM security in its governance context: lawful interception versus abuse, NIS2, and the move to 3G, 4G and 5G
Prerequisites
GSM Fundamentals
GSM Architecture

>>> Clearance required

Unlock with Professional

This content is included with the Professional plan.

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Career Outcomes
01Scope and run an authorised GSM security assessment against a controlled range and report it professionally
02Explain GSM attack classes and their detections to an operator security team
03Design signalling-security monitoring and false-base-station detection for a mobile network
04Advise on 2G risk, the migration off GSM, and the security differences in 3G, 4G and 5G
GSM Security Badge
Completion Badge
Course Achievement

GSM Security Badge

Passing the final exam earns the GSM Security Specialist achievement. It shows you can describe the GSM attack surfaces at mechanism level, run an authorised assessment lawfully against a controlled range, and design the detection and mitigation an operator uses against each threat class.

RequiredThe achievement is awarded for passing the GSM Security final exam: 75 questions drawn from a bank of 150, with 70% needed to pass. Attempts are unlimited, with a 7-day wait between attempts. The module quizzes are practice and do not award the achievement on their own.
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