card a leading role in the management of security and as a controller of peripherals by removing the peripherals into an external reader connected to the card by a standard chip card connector from this moment onwards the reader in question can receive a card in iso format or a small card whatever its size the chip card 20 as illustrated is a preferred format more generally the micro module 20 can have different forms thus the micro module can consist of an integrated circuit which is mounted and wired on a printed circuit or a holding body of the metallic and flexible type the micro module is thus advantageously protected by transfer moulding or encapsulation in a protective resin in the case of an iso card the micro module is first cut up and then inserted onto a plastic card body to the iso 7816 format specifications in the case of a plug in a card to iso dimensions is produced and is then pre cut or cut in order to form a small card identical to that used in mobile telephones known under the name of sim card an external view is given in fig2 of a reader conforming to the functional diagram in fig1 in this example the box 11 is in the form of a paving slab fitted with a central receptacle 11 a for the card and has a translucent window 11 b allowing accommodation of the card 20 another example of reader is illustrated.