One embodiment of the invention comprises a functional module for storing and exchanging data, comprising a common portable support, at least one passive contactless integrated circuit in the form of a first semi-conductor chip, a contactless integrated circuit reader in the form of a second semi-conductor chip, the contactless integrated circuit and the reader being gathered on or in the common portable support, an antenna coil of the contactless integrated circuit, connected to the contactless integrated circuit, an antenna coil of the reader, connected to the reader, the antenna coil of the contactless integrated circuit being coupled to the antenna coil of the reader.