On Modeling Post Decryption Error Processes in UMTS Air Interface

Authors:
Fouz Sattar;Muid Mufti
Affiliations:
Department of Electrical Engineering, University of Engineering and Technology, Taxila, Pakistan;Department of Electrical Engineering, University of Engineering and Technology, Taxila, Pakistan
Venue:
Information Security and Cryptology
Year:
2007

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Abstract

This paper analyzes the impact of encryption over the UMTS air interface. Using a finite state Markov characterization of the UMTS decryption process, a stochastic model has been developed that quantifies the impact of bit errors in the ciphertext and cipher synchronization counter. The effects of residual bit errors, UMTS air interface power budget, interleaving span and channel coding rate on the decryption process are analyzed.