Abstract: The protection device (1) avoids accidental or fraudulent intrusion of at least one contactless communication object (3) with a smart circuit (31, 32) storing sensitive information or information giving access to services, the electronic circuit of the protected object remaining unchanged, notably by means (13) for receiving radio signals (S22) in a range of frequencies of the order of one megahertz to a few tens of megahertz, the received radio signals generating the operating power for enabling a circuit (11) generating a scrambling signal to be emitted by emission means (14) of the protection device as scrambling radio waves (S21) and switching means (12) validating or invalidating the operation of the generator of the scrambling signal of the protection device.

Abstract: The invention relates to a simple protection device (1) against accidental or fraudulent intrusion of at least one contactless communication object (3) with a smart circuit (31, 32) storing sensitive information or information giving access to services, the electronic circuit of the protected object remaining unchanged, notably by means (13) for receiving radio signals (S22) in a range of frequencies of the order of one megahertz to a few tens of megahertz, the received radio signals generating the operating power for enabling a circuit (11) generating a scrambling signal to be emitted by emission means (14) of the protection device as scrambling radio waves (S21) and switching means (12) validating or invalidating the operation of the generator of the scrambling signal of the protection device.

Abstract: The invention concerns a display system comprising a plurality of chip cards (1) and a chip card reader (9), each chip card (1) comprising a software and a body (2) produced in synthetic material and wherein is provided a communication interface, the reader (9) comprising a box (10) and a display screen capable of displaying different messages, the box (10) being provided with a slot (12) capable of receiving a chip card (1), a communication interface being arranged in the slot for providing an electric connection between the reader (9) and each chip card (1). The chip card (1) comprises a display part (4) capable of being urged to co-operate by being superposed with the reader (9) display screen.