The invention relates to a device for processing data coming from a contactless memory card, said device comprising at least one contactless memory card reader. Such a device comprises:means for acquiring input data coming from an input peripheral;means for processing at least one sequence of a remote transaction initialized on the basis of data coming from a contactless card;means for selecting a mode of operation comprising at least two states: a state, called an inactivation state, in which said processing means and said at least one memory card reader are inactive; a state, called an activation state, in which said processing means are active and in which the input data entered through said input peripheral are controlled by said processing means.