Abstract: A system and method for managing one or more applications deployed on a mobile electronic device, such as a cellular phone, are disclosed. The system and method enable the user of a mobile electronic device to select one of a plurality of applications deployed on the mobile electronic device for use in a transaction and to authenticate himself or herself prior to initiating the transaction. The transaction may occur via a wireless interface and/or a contact-based interface. In addition, the system and method allow the user to manage applications deployed on a mobile electronic device, including adding new applications, designating nicknames for the applications and setting security codes for each application.