Modern mobile phones are more than just simple electronic devices for mobile communication. New hardware and software technology allows a great variety of application domains on devices today. People's mobile phones have become one of their most personal possessions: the contacts, photos, music, and applications are a digital representation of their owner. Through the integration of contactless smartcard technology, also referred to as Near Field Communication (NFC), this concentration of personal information is strengthening. For this reason, safety and privacy mechanisms need to be considered before integrating new technology or applications into a device. What the appropriate mechanisms should be will be treated in more detail in this work.

This thesis deals with the secure management of NFC applications in the smartcard chip of a mobile device, both conceptually and via a prototypical implementation. Of primary concern in this work are NFC applications for the emulation of smartcards, which run on the so-called secure element, in contrast to conventional software, which runs on the application processor of the telephone. Integrating a secure element and contactless smartcard functionality into a mobile device produces a smartcard with a display, a keyboard and a network connection. Using these components, it can be shown how applications in the secure element of a telephone can be managed through a data connection. The concepts presented can be used to remove the need for physical plastic cards in the future, as the issuing process can be done via the mobile network.