27-09-2010, 01:10 PM
[attachment=4491]
the gsm system
http://wrankl.de/SCH/SIM.pdf
abstract
The smart card used inGSMmobile telephones, which is called the ‘subscriber identity module’
(SIM), was and still is the pioneer in terms of functionality and memory capacity. This is in part
due to the fact that smart cards used in mobile telephones, whose manufacturing costs are several
hundred euros, are significantly less price sensitive than other types of smart cards, such as those
used for electronic payments or medical applications. Another decisive factor with regard to
smart card technology is the generally high rate of evolution of the entire telecommunications
sector. The pioneering position with regard to technology and standardization that is presently
held by the SIM, in comparison with all other smart card applications, is the reason why this
topic is described here in such great detail.