Abstract: A near-field magnetically coupled anti-counterfeiting tag including a sacrificial conductive track crossing a sacrificial zone of the tag. Each segment of the sacrificial track crossing the sacrificial zone is split longitudinally into a plurality of sub-segments, the sub-segments being in electrical contact with each other at the ends of the segment.

Abstract: A communication interface comprises an input terminal (Rx) for receiving a logic signal from a remote interface (IF2); a logic level discriminator (12) coupled to the input terminal; a peak detector (14) connected to store the peak value of the signal at the input terminal; and a voltage follower (16) connected to the discriminator for providing an auxiliary supply voltage (Vdd2?) based on the value provided by the peak detector. An electrostatic discharge (ESD) protection device is further provided, including a first diode (D1) and an RC-circuit forming the peak detector, connected in series between the input terminal (Rx) and a first power supply line (Vss1); a transistor (MN1) connected between the first power supply line (Vss1) and the input terminal (Rx) through the first diode (D1) or a second diode (D1?); and inverter (42) configured to turn on the transistor when the voltage across the capacitor of the RC-circuit is less than a threshold.

Abstract: A near-field magnetically coupled anti-counterfeiting tag including a sacrificial conductive track crossing a sacrificial zone of the tag. Each segment of the sacrificial track crossing the sacrificial zone is split longitudinally into a plurality of sub-segments, the sub-segments being in electrical contact with each other at the ends of the segment.

Abstract: The invention relates to a near field magnetically coupled contactless tag, comprising a substrate comprising a rupture zone; a master microcircuit arranged on the substrate on one side of the rupture zone, and configured to be interrogated by a near-field reader; a slave microcircuit arranged on the substrate on the other side of the rupture zone; and a sacrificial link connecting the two microcircuits, wherein the two microcircuits are configured to negotiate mutual authentication through the sacrificial link.

Abstract: The invention relates to a near field magnetically coupled contactless tag, comprising a substrate comprising a rupture zone; a master microcircuit arranged on the substrate on one side of the rupture zone, and configured to be interrogated by a near-field reader; a slave microcircuit arranged on the substrate on the other side of the rupture zone; and a sacrificial link connecting the two microcircuits, wherein the two microcircuits are configured to negotiate mutual authentication through the sacrificial link.

Abstract: An NFC tag includes a foldable substrate in the form of a tape; an antenna located at a first end of the tape; a capacitor connected to the antenna, located at the first end of the tape; an impedance, in particular a capacitor, located at a second end of the tape; and conductive tracks running along the tape to connect the impedance to the antenna.

Abstract: A near field magnetically coupled anti-counterfeiting tag comprises a control microcircuit configured to implement a basic function and a cryptographic function; a sacrificial conductive track located across a sacrificial area of the tag; and a circuit for detecting continuity of the sacrificial track, cooperating with the microcircuit to implement the basic function without implementing the cryptographic function when the sacrificial track is broken.

Abstract: A near field magnetically coupled contactless device includes a foldable substrate in the form of a tape; two metal surfaces located facing each other on opposite sides of the substrate in a region of interest of the substrate, configured such that a piercing of the region of interest causes a permanent short circuit between the two metal surfaces; and a circuit configured to detect a short circuit between the two metal surfaces.

Abstract: A method for securing the sale of an item (OB), including steps of storing item identifier (PCA) and owner identifier (UID) by a server (BSRV) and in a secure memory of electronic tag (TG) linked to item, transmitting item identifier, from electronic tag to a terminal (SP1) through contactless or near field link, providing by the server information (PINF) relative to item (OB) in response to a request (VFRQ) designating item, transmitting to server an update request identifying the owner, containing information relative to the new owner of item, storing by the server the information relative to new owner in relation with item identifier, generating by the server a write request (EID) containing an identifier (UID) of new owner, transmitting write request to electronic tag through contactless or near field link, and storing in the electronic tag the identifier of new owner received in write request.

Abstract: An NFC tag includes a foldable substrate in the form of a tape; an antenna located at a first end of the tape; a capacitor connected to the antenna, located at the first end of the tape; an impedance, in particular a capacitor, located at a second end of the tape; and conductive tracks running along the tape to connect the impedance to the antenna.

Abstract: A near field magnetically coupled anti-counterfeiting tag comprises a control microcircuit configured to implement a basic function and a cryptographic function; a sacrificial conductive track located across a sacrificial area of the tag; and a circuit for detecting continuity of the sacrificial track, cooperating with the microcircuit to implement the basic function without implementing the cryptographic function when the sacrificial track is broken.

Abstract: A near field magnetically coupled contactless device, comprises a foldable substrate in the form of a tape; an antenna circuit tuned to a nominal frequency, including an antenna and a capacitor connected to the antenna; a sacrificial impedance connected to the antenna circuit to contribute to the tuning of the antenna circuit to the nominal frequency; and a sacrificial structure comprising a conductive track connecting the sacrificial impedance to the antenna circuit, configured in meanders occupying a region of interest of the substrate such that a piercing of the region of interest severs the conductive track.