Method and Device For Providing Active Security to a Contact-Free Electronic Device
AssigneeOberthur Card Systems SA
InventorDan Serbanescu
Life of this patent
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Abstract
The invention concerns a scrambling electronic device adapted to be magnetically coupled with an inductive element (L3) of a contact-free external communication station (LEC). The scrambling device comprises active scrambling means (DB) adapted, in response to the magnetic field radiated by the external communication station (LEC), to generate a charge modulation capable of causing a collision with the charge modulation generated by the contact-free electronic device (CSC) when the latter is arranged relative to said scrambling electronic device in accordance with a selected relationship, said resulting collision disabling data exchange between the contact-free external communication station (LEC) and the contact-free electronic device (CSC).
Claims20
Jammer electronic device adapted to be magnetically coupled with an inductive component (L3) of an external contact-free communication station (LEC), characterized in that it comprises active jamming means (DB) adapted, in response to the magnetic field radiated by the external communication station (LEC), to generate a load modulation liable to cause a collision with the load modulation generated by a contact-free electronic device (CSC) when the latter is disposed relative to said jammer electronic device in accordance with a chosen relationship, said collision caused in this way rendering inoperative the exchange of information between the external contact-free communication station (LEC) and the contact-free electronic device (CSC).
Electronic entity of the document or like type, including a support (10) having at least a first portion (12) and a second portion (14) adapted to move one relative to the other and a contact-free electronic device (CSC) mounted in the first portion (12) of the support (10) and including an electronic microcircuit (IC) and an antenna (L2) electrically connected to said electronic microcircuit (IC) and adapted to be coupled magnetically with an external contact-free communication station (LEC), characterized in that the second portion (14) has a jammer electronic device (DB) comprising active jamming means adapted, in response to the magnetic field radiated by the external communication station (LEC), to generate a load modulation liable to cause a collision with the load modulation generated by the contact-free electronic device (CSC) when it is placed in a chosen relationship relative to said jammer electronic device, said collision caused in this way rendering inoperative the exchange of information between the external contactless communication station (LEC) and the contact-free electronic device (CSC).
Method for providing active security to a contact-free electronic device (CSC), characterized in that it provides for the use of a jammer electronic device (DB) adapted, in response to the magnetic field radiated by an external communication station (LEC), to generate a load modulation liable to cause a collision with the load modulation generated by the contact-free electronic device (CSC) when the latter is disposed relative to said jammer electronic device in a chosen relationship, said collision caused in this way rendering inoperative the exchange of information between the external contact-free communication station (LEC) and the contact-free electronic device (CSC).
Method of making secure the exchange of information between a contact-free electronic device (CSC) and an external contact-free communication station (LEC), said contact-free electronic device (CSC) including an electronic microcircuit (IC) and an antenna (L2) electrically connected to said electronic microcircuit (IC) and adapted to be magnetically coupled with the external contact-free communication station (LEC), characterized in that provision is made for using a jammer electronic device (DB) comprising active jamming means adapted, in response to the magnetic field radiated by the external communication station (LEC), to generate a load modulation liable to cause a collision with the load modulation generated by the contact-free electronic device (CSC) when the latter is disposed in a chosen relationship relative to said jammer electronic device, said collision caused in this way rendering inoperative the exchange of information between the external contact-free communication station (LEC) and the contact-free electronic device (CSC).
Dependencies are inferred from the claim text.