Gemplus Card International

Patrice Peyret

Jean-Yves Le Roux

Jacek A Kowalski

Thierry Karlisch

The invention relates to exchangeable memory or PC-cards with several integrated circuits for personal computers. These PC-cards are used as a large capacity mass memory for replacing floppy disks and other exchangeable magnetic supports. To protect the content of these PC-cards against unauthorized use, the invention proposes the incorporation into the card (CC) of a specific security integrated circuit chip (MPS), which performs a clearance function for access to the memory chips (MEM). A microcontroller (MPC) also placed in the card communicates with the computer and with the security circuit. It makes the security chip validate a confidential code introduced from the computer, while also supplying memory chip control signals as a function of the validation result.

Microcomputer PC-cards

The invention relates to exchangeable memory or PC-cards with several integrated circuits for personal computers. These PC-cards are used as a large capacity mass memory for replacing floppy disks and other exchangeable magnetic supports. To protect the content of these PC-cards against unauthorized use, the invention proposes the incorporation into the card (CC) of a specific security integrated circuit chip (MPS), which performs a clearance function for access to the memory chips (MEM). A microcontroller (MPC) also placed in the card comnunicates with the computer and with the security circuit. It makes the security chip validate a confidential code introduced from the computer, whilst also supplying memory chip control signals as a function of the validation result.

A secured system of remote participation in interactive games with verification of the chronology of events relies on the counting, by a secured microprocessor (for example a microcircuit card), of consecutive periods of time of which the first one (Tr12) is initialized by a cryptographically secured message sent by the transmitter and the last one (Tr25) is ended by a connection of the games machine to the central computer of the transmitter for the forwarding thereto of the answer.

Secured system of remote participation in interactive games with

An interface is made for a device for the exploitation of electrical signals between a receiver of this device and a device for the exploitation of these signals. The interface is capable of sending, alternatively, signals received by the receiver to an external circuit and signals delivered by the external circuit to the exploitation circuit. It is shown that this approach can be used to resolve problems of the scrambling and unscrambling of audio-visual signals.

Method and device for the utilization of electrical signals

Method for controlling a printer in order to obtain postages

The invention concerns interface circuits for chip card readers. It consists of providing link connections between this circuit and the reader, these connections being identical to those established between the circuit and the chip card. An internal switch (102) in the circuit is used to link these connections together, or to a control register (101), which is internal to the circuit, and actuated by an additional control connection. With the invention, it is possible to limit the number of connections between the circuit and the reader and to control the circuit with a software interface which is identical to the control interface of a chip card.

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Fuveau, France

Patrice Peyret