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GSM Security

Measures to protect Global System for Mobile (GSM) communications from eavesdropping and attacks.

Understanding GSM Security 


It focuses on protecting mobile communications from eavesdropping, impersonation, and network attacks. While GSM employs encryption algorithms like A5/1 and A5/3, vulnerabilities such as SS7 protocol exploitation and IMSI catching allow attackers to intercept calls and SMS.

Common Applications and Use Cases


  • Mobile Voice and Data Encryption – Protecting cellular communications from interception.

  • IMSI Catching (Fake Base Stations) – Attackers use stingrays to intercept and track mobile devices.

  • SS7 Vulnerabilities – Exploited by attackers to bypass 2FA, intercept messages, and track users.

Best Practices and Security Considerations


  • Use End-to-End Encrypted Calls – Prefer VoIP apps like Signal or WhatsApp over traditional GSM calls.

  • Disable SMS-Based 2FA – Use app-based authentication or hardware security keys.

  • Avoid Public Wi-Fi for Sensitive Communications – Use VPNs to encrypt mobile data.

  • Monitor Cellular Traffic for Anomalies – Detect rogue base stations and unauthorized network access.

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