INHALTSVERZEICHNIS 2 Abkürzungen DTD Document Type Definition ECML Electronic Commerce Modelling Language EMV Eurocard, Mastercard, Visa International GSM Global System for Mobile communication IVR Inteligent Voice Recognition MSISDN    Mobile Station ISDN Number OTA Over the Air PDA Personal Digital Assistant, auch Organizer PLMN Public Land Mobile Network PTD Personal Trusted Device SAT SIM Application Toolkit (GSM 11.14) SBW Server Based Wallet ([20]) SIM Subscriber Identity Module UMTS Universal Mobile Telecommunication System VAS Value Added Services, Mehrwertdienste WAP Wireless Application Protocol, siehe [5] WIM Wireless Identity Module (Teil des WAP-Standards) WPKI Wireless Public Key Infrastructure (Teil des WAP-Standards) WTLS Wireless Transport Security (Teil des WAP-Standards)