Decoding GSM

Glendrange, Magnus (Norwegian University of Science and Technology, Faculty of Information Technology, Mathematics and Electrical Engineering, Department of Telematics)

Hove, Kristian (Norwegian University of Science and Technology, Faculty of Information Technology, Mathematics and Electrical Engineering, Department of Telematics)

Hvideberg, Espen (Norwegian University of Science and Technology, Faculty of Information Technology, Mathematics and Electrical Engineering, Department of Telematics)

Title:

Decoding GSM

Department:

Norwegian University of Science and Technology, Faculty of Information Technology, Mathematics and Electrical Engineering, Department of Telematics

Publication type:

Student thesis

Language:

English

Publisher: Institutt for telematikk

Pages:

213

Year of publ.:

2010

URI:

urn:nbn:no:ntnu:diva-11089

Permanent link:

http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-11089

Local ID:

ntnudaim:5478

Keywords(no) :

ntnudaim:5478, SIE7 kommunikasjonsteknologi, Nett og tjenester, Telematikk

Abstract(en) :

We have participated in the creation of almost two terabytes of tables aimed at cracking A5/1, the most common ciphering algorithm used in GSM. Given 114-bit of known plaintext, we are able to recover the session key with a hit rate of 19%. The tables are expected to be unique as they provide the best coverage yet known to the authors, and they are the first step in a real-world passive attack against GSM. An initial investigation and analysis into the air interface of GSM were performed, from both a theoretical and practical point of view. These examinations would be essential in order to utilize the generated tables in a practical attack.Additionally, a rogue GSM network was built and deployed without enabling ciphering and frequency hopping. This active attack was purely based on open-source software and hardware, implying that real GSM networks could be spoofed with resources available to the general public.

Supervisor:

Mjølsnes, Stig Frode, Professor (Norwegian University of Science and Technology, Faculty of Information Technology, Mathematics and Electrical Engineering, Department of Telematics)
Gligoroski, Danilo (ITEM)

Available from:

2010-10-07

Created:

2010-10-07

Statistics:

110 hits

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