Entity Authentication
UMTS provides mutual authentication between the UMTS subscriber, represented by a smart card application known as the USIM (Universal Subscriber Identity Module), and the network in the following sense 'Subscriber authentication': the serving network corroborates the identity of the subscriber and 'Network authentication': the subscriber corroborates that he is connected to a serving network that is authorised, by the subscribers home network, to provide him with services.
Read more about this topic: UMTS Security
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“What is this world of ours? A complex entity subject to sudden changes which all indicate a tendency to destruction; a swift succession of beings which follow one another, assert themselves and disappear; a fleeting symmetry; a momentary order.”
—Denis Diderot (1713–1784)