Security assessment of GSM Um interface using SDR systems
Αξιολόγηση ασφάλειας της GSM διεπαφής Um με την χρήση συστημάτων SDR
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Ασφάλεια δικτύωνAbstract
Lately, we have been experiencing an increasing popularity of LTE and 5G technologies. This popularity, however, doesn’t seem to be enough to limit the deployment and usage of the oldest GSM cellular networks. The fact is that the GSM technology is active and will remain active and supported by most telecommunications providers for many years to come. According to Informa, there is an estimated 4.6 billion GSM subscribers worldwide, and this raises the key question of whether a ~20-year-old technology that serves such a large percentage of devices is secure. Another worrying question is how easily an attacker can cause downgrade to GSM technology, from the seemingly invulnerable LTE networks. In this master thesis we will try to answer these questions both theoretically and practically as well as to prove that as long as the GSM network infrastructure is active, the security provided by the new LTE networks can be pbypassed. In other words, we will prove the infallible law of security, which also applies to mobile networks, and states: security is as strong as the weakest link. More specifically we will first present the structure of the GSM network as well as the protocols that define it. Next we will present the SDR systems in combination with the Open Source Mobile Communication projects that we will use to carry out specific Um interface attacks. In the Hands on part of the master thesis we will integrate the limesdr mini to openBTS in order to carry out active attacks on GSM Um interface. Finally, by using HackRF, we will show how we can force our target device to downgrade from 4G to GSM technology.
Postgraduate Studies Programme
Ασφάλεια Ψηφιακών ΣυστημάτωνDepartment
Σχολή Τεχνολογιών Πληροφορικής και Επικοινωνιών. Τμήμα Ψηφιακών ΣυστημάτωνNumber of pages
73Language
EnglishCollections
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Αναφορά Δημιουργού-Μη Εμπορική Χρήση-Όχι Παράγωγα Έργα 3.0 Ελλάδα
Αναφορά Δημιουργού-Μη Εμπορική Χρήση-Όχι Παράγωγα Έργα 3.0 Ελλάδα