A vehicle equipment seal device includes a main body portion, a bolt portion, a metal wire connection portion and a lock structure. The main body portion has a connection surface. The bolt portion is inserted into the main body portion. The metal wire connection portion has one end fixed on the connection surface of the main body portion, and the other end provided with the bolt portion. The lock structure is arranged in the main body portion, wherein the lock structure includes a motor and a sensor, and the sensor is used to position a turning position of the motor, thereby determining whether the lock structure locks the bolt portion or unlocks the bolt portion.

Tamper-respondent assemblies and methods of fabrication are provided which include at least one tamper-respondent sensor and a detector. The at least one tamper-respondent sensor includes conductive lines which form, at least in part, at least one tamper-detect network of the tamper-respondent sensor(s). The detector monitors the tamper-respondent sensor(s) by applying an electrical signal to the conductive lines of the at least one tamper-respondent sensor to monitor for a non-linear conductivity change indicative of a tamper event at the tamper-respondent sensor(s). For instance, the detector may monitor a second harmonic of the electrical signal applied to the conductive lines for the non-linear conductivity change indicative of the tamper event, such as an attempted shunt of one or more conductive lines of the tamper-respondent sensor(s).

A merchandise security system for an electronic item of merchandise is provided. In one example, the merchandise security system includes a continuous alarming power cord comprising at least one electrical conductor. The alarming power cord has a first end adapted to be electrically connected to the electronic item of merchandise and a second end. The merchandise security system also includes a reel for receiving the second end of the alarming power cord and adapted for storing at least a portion of the alarming power cord thereon. In addition, the merchandise security system includes monitoring circuitry in electrical communication with the alarming power cord and configured to detect an interruption in an electrical signal provided to the alarming power cord.

The present invention relates to a metal protective net, including: multiple steel wires arranged in parallel; multiple metal connecting sheets arranged in parallel, where the metal connecting sheets and the steel wires are arranged to intersect with each other at multiple intersections without being connected; insulating members which are provided between the steel wires and the metal connecting sheets and located at the intersections, and fixedly connected therewith; and connecting terminals, where both ends of each steel wire each are connected with one connecting terminal, and both ends of each metal connecting sheet each are connected with one connecting terminal; and a monitoring device electrically connected with the connecting terminals. The steel wires and the metal sheets, which form the metal protective net, are not electrically conductive with each other, forming many individual loops. If the metal net is broken, an alarm can be sent by the monitoring device.

Tamper-respondent assemblies and methods of fabrication are provided which include a multi-layer stack having multiple discrete component layers stacked and electrically connected together via a plurality of electrical contacts in between the component layers. Further, the tamper-respondent assembly includes a tamper-respondent electronic circuit structure embedded within the multi-layer stack. The tamper-respondent electronic circuit structure includes at least one tamper-respondent sensor embedded, at least in part, within at least one component layer of the multiple discrete component layers of the multi-layer stack. The tamper-respondent electronic circuit structure defines a secure volume within the multi-layer stack. For instance, the tamper-respondent electronic circuit structure may be fully embedded within the multi-layer stack, with monitor circuitry of the tamper-respondent electronic circuit structure residing within the secure volume within the multi-layer stack.

Tamper-respondent assemblies and methods of fabrication are provided which include a multi-layer stack having multiple discrete component layers stacked and electrically connected together via a plurality of electrical contacts in between the component layers. Further, the tamper-respondent assembly includes a tamper-respondent electronic circuit structure embedded within the multi-layer stack. The tamper-respondent electronic circuit structure includes at least one tamper-respondent sensor embedded, at least in part, within at least one component layer of the multiple discrete component layers of the multi-layer stack. The tamper-respondent electronic circuit structure defines a secure volume within the multi-layer stack. For instance, the tamper-respondent electronic circuit structure may be fully embedded within the multi-layer stack, with monitor circuitry of the tamper-respondent electronic circuit structure residing within the secure volume within the multi-layer stack.

A method of detecting disturbance in a metallic conductor, comprises the steps of providing an inductance sensing circuit in mechanically and electrically connected to a metallic conductor having a monitorable inductance, tuning the inductance sensing circuit based on an electromagnetic field impressed upon the metallic conductor and an internally generated circuit oscillation, and outputting an alert signal when a tuned output signal from the tuned inductance sensing circuit becomes detuned due to a change in inductance of the metallic conductor by addition to or removal of at least a portion of the metallic conductor. A metallic conductor disturbance detection device for such a method is also provided, the device comprising an amplitude and/or frequency tunable inductance sensing circuit, and an alarm circuit for outputting an alarm signal based on an output of the inductance sensing circuit.

A method of detecting disturbance in a metallic conductor, comprises the steps of providing an inductance sensing circuit in mechanically and electrically connected to a metallic conductor having a monitorable inductance, tuning the inductance sensing circuit based on an electromagnetic field impressed upon the metallic conductor and an internally generated circuit oscillation, and outputting an alert signal when a tuned output signal from the tuned inductance sensing circuit becomes detuned due to a change in inductance of the metallic conductor by addition to or removal of at least a portion of the metallic conductor. A metallic conductor disturbance detection device for such a method is also provided, the device comprising an amplitude and/or frequency tunable inductance sensing circuit, and an alarm circuit for outputting an alarm signal based on an output of the inductance sensing circuit.

A security device for preventing or deterring theft of an object from a retail store or similar comprising a housing; a loop of cable extending from the housing for placement around said object; spool means rotatably mounted on the housing, the loop of cable being attached to the spool means such that, in use, rotation of the spool means in a first direction with respect to the housing causes the cable to unwind from the spool means, and rotation of the spool means in a second direction causes the cable to be wound around the spool means; latching means; alarm means; and retracting means arranged to apply a biasing force to the spool means.

A security device for preventing or deterring theft of an object from a retail store or similar comprising a housing; a loop of cable extending from the housing for placement around said object; spool means rotatably mounted on the housing, the loop of cable being attached to the spool means such that, in use, rotation of the spool means in a first direction with respect to the housing causes the cable to unwind from the spool means, and rotation of the spool means in a second direction causes the cable to be wound around the spool means; latching means; alarm means; and retracting means arranged to apply a biasing force to the spool means.