Global system for mobile communication (GSM) is the largest used operator network. The early phase of this paper deals with the gigantic ken of GSM provided services and various security aspects in order to prevent the services from being deteriorated. But with great power comes great responsibility to be persistent about its level of performance, for the same the GSM association evolved with algorithms. Also the need for security in telecommunication has a shared view in this paper. Nevertheless this paper sets a glance on each of these developed algorithms. Algorithms being a strictly private affair they were never exposed to public, yet the paper makes an effort least to have an informative approach about them.
Keywords: Authenticaton, Ciphering, Encryption, GSM
