Abstract: In a checking system, notably for checking the identity of persons, the person to be checked is the bearer of a chip card containing a limited series of information elements constituting a codified representation of significant morphological characteristics of the card bearer's face. The checking station comprises a card reader for the preparing and presenting, on a screen, of a schematic image of the face on the basis of the codified information elements read in the card. It is then possible to make a comparison between the displayed face and the bearer's face, as well as between the displayed face and the bearer'photograph which may be attached to the card.

Abstract: A method of transaction replenishes a microprocessor-based card. The card computes a certificate of authenticity on the basis of data elements that it contains and that include the contents of its counter of the number of replenishment operations and its identification number. These data elements enable the card to verify its entitlement to be replenished. The card increments its counter of the number of replenishments. A replenishment terminal reads the identification number of the card and transmits to the card the data elements that pertain to it and that comprise the certificate of authenticity corresponding to it for the cycle in progress. The received certificate is compared with a certificate computed by the card. When the certificates are equal, the card accepts a replenishment of units.