EMV is an abbreviation of the three companies Europay International, MasterCard and VISA, who developed the EMV standard. EMV is a norm for payment cards and for the correspondent acceptance devices (POS terminals and ATMs). The EMV norm is managing two main tasks: interoperability and flexibility. Interoperability means that the same cross-system and transnational card- and terminal utilisation known from the magnetic stripe technology is also given at the chip card technology. Flexibility means that furthermore every monetary transactions system must have the possibility to realise individual requirements beyond the interoperability.