The invention relates to a method for producing a security document, wherein a body is created that comprises two superimposed layers, a circuit which is electric and/or has an electronic chip arranged on the interface between the two layers, and a first adhesive between the two layers, which adheres to the two layers and/or the circuit. The method includes a step of depositing a second adhesive which is different from, or has a different behaviour from, the first adhesive in relation to the solvents or the temperature and partially adheres to at least one of the two layers and/or the circuit.

An identification device includes a ring incorporating at least one radiofrequency transponder which includes at least one microcontroller and at least one antenna to emit an electromagnetic field conveying identification data. The identification device further includes an electrical circuit having at least one light-sensitive element. The electrical circuit is mounted electrically between the microcontroller and the antenna such that, when the light-sensitive element receives light, the light-sensitive element acts in a first state as an open switch to electrically isolate the antenna with respect to the microcontroller. When the light-sensitive element is masked, the light-sensitive element acts in a second state as a closed switch, so as to establish an electrical connection between the antenna and the microcontroller in order to permit a current originating from electromagnetic induction of the antenna to flow.

The invention mainly relates to an identification device (1) comprising a ring (2) incorporating at least one radiofrequency transponder (3) including at least one microcontroller (7) and at least one antenna (8) for emitting an electromagnetic field conveying identification data, characterized in that said identification device (1) comprises an electrical circuit (9) comprising at least one light-sensitive element (D0), said electrical circuit (9) being mounted electrically between said microcontroller (7) and said antenna (8), in such a way thatwhen said light-sensitive element (D0) receives light, said light-sensitive element (D0) acts in a first state as an open switch, so as to electrically isolate said antenna with respect to said microcontroller; andwhen said light-sensitive element (D0) is masked, said light-sensitive element (D0) acts in a second state as a closed switch, so as to establish an electrical connection between said antenna (8) and said microcontroller (7) in order to permit a current originating from electromagnetic induction of said antenna (8) to flow.

A radio frequency identification (RFID) transponder may include a substrate and a device. The substrate may be in communication with a controller and an antenna, and the antenna is arranged to receive radio frequency signals. A first side surface of the substrate may include a capacitor. The device may be detachably coupled with the substrate via a conductive member positioned between the structure and the capacitor of the substrate, and the conductive member may be within a desired proximity of the capacitor. The structure may be attached to an attachment surface so that an attachment strength between the structure and the attachment surface may be greater than a force required to decouple the structure from the substrate. When the structure is decoupled from the substrate, the conductive member separates from the capacitor, disabling the transponder.

A radio frequency identification (RFID) transponder may include a substrate and a device. The substrate may be in communication with a controller and an antenna, and the antenna is arranged to receive radio frequency signals. A first side surface of the substrate may include a capacitor. The device may be detachably coupled with the substrate via a conductive member positioned between the structure and the capacitor of the substrate, and the conductive member may be within a desired proximity of the capacitor. The structure may be attached to an attachment surface so that an attachment strength between the structure and the attachment surface may be greater than a force required to decouple the structure from the substrate. When the structure is decoupled from the substrate, the conductive member separates from the capacitor, disabling the transponder.

The present invention provides an RFID inlet antenna comprising a resin base film and a metallic circuit formed via an adhesive layer on the surface of the resin base film. The RFID inlet antenna is prevented from removal of the metallic circuit by unauthorized detachment after the RFID inlet antenna is bonded to an item by a bonding material disposed in such a manner as to cover the metallic circuit.

Systems and methods for monitoring wear of a wearable component use an RFID antenna embedded in the wearable component to indicate whether wear has reached a predetermined limit. A monitoring device includes an RF transceiver, an RF antenna linked to the RF transceiver, and a processor configured to emit an RF probe signal from the RF antenna via the RF transceiver, and to determine whether the wearable component has worn beyond the predetermined limit based on whether a responsive RFID signal is received from the embedded RFID antenna.

An anti-tamper passive Radio Frequency Identification (RFID) transponder for attachment to a surface that is at least partially translucent includes: an RFID inlay, including an RFID Integrated Circuit (IC) chip connecting to an RFID antenna; and a first opaque label on a first side of the RFID inlay. When attached to the surface, the first opaque label is between the RFID inlay and the surface, and the first opaque label is viewable through the surface while preventing view of the RFID inlay through the surface. The first opaque label is with pre-cut lines. The passive RFID transponder and the pre-cut lines are configured and arranged such that when a removal of the passive RFID transponder from the surface is attempted, after being attached to the surface, the RFID antenna is damaged and the RFID inlay is rendered inoperable.

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.

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.