A media package storing program code, the media package comprising a medium storing a first part of the program code intended to be executed on a processor external to the media package, and a processing device storing a state and a second part of the program code, the first and the second parts of the program code being adapted to interact when executed so as to execute the program code. The processing device comprises a processor for verifying the state and for executing the second part of the program code if the verification of the state indicates that this is authorized; and a first interface for communication with the processor external to the media package. The processing device further comprises a second interface adapted to interact with a state change device in order to set the state from a first state not authorizing execution of second part of the program code to a second state authorizing execution of second part of the program code. The second interface is a Radio Frequency interface adapted to, when the media package is in the first state, interact with at least one anti-theft portal. Also provided is a system.