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Abstract

Comparison of security in GSM and UMTS systems

The scope of my work encompasses the analysis of GSM and UMTS standards with emphasis placed on security. I thoroughly investigated the details of network architecture, protocols and algorithms. I also presented the most severe pattems of attacks that allow the particular security services offered by these systems to be broken. In the third part I focused my attention on describing the most common situation nowadays, when this two systems work simultaneously.

The integral part of this work is as well a presentation madę with Flash technology (which depicts functioning of authentication protocols and algorithms used) and a program crackcompl28 which implements the simplest attack on the authentication algorithms used in the GSM networks.

Key words: GSM, UMTS, security, COMP128, A5, MILENAGE, KASUMI.

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