Various implementations described herein are related to a device having sensing circuitry that receives an input signal and provides an output signal based on sensing a resistance differential between multiple shield resistors or based on sensing a change in voltage across a shield wire of a shield wiring network. The device includes comparing circuitry that receives the output signal and provides an alarm signal based on detecting a tampering event associated with the resistance differential or the change in voltage.

In some embodiments, a method can include measuring, via a sensor disposed within an interior of a housing, an out-of-band characteristic of an electronic circuit disposed within the interior of the housing. The method can further include receiving, from the sensor and at a management circuit disposed within the interior of housing, a sensor signal indicating the out-of-band characteristic of the electronic circuit. The method can further include analyzing, at the management circuit, the out-of-band characteristic of the electronic circuit to produce an alarm signal. The method can further include sending, from the management circuit, the alarm signal to initiate a remedial action in response to receiving the alarm signal.

A point of sale (POS) device includes a flexible member with two exposed conductive areas that are part of a tamper detection circuit. While a recess receives a screw, the screw passes through apertures in the flexible member and in a conductive gasket, and the conductive gasket connects the two exposed conductive areas to one another, closing the tamper detection circuit. Adhesives affix the flexible member to the screw and the conductive gasket to the recess opening so that removing the screw from the recess separates the conductive gasket from the two exposed conductive areas, opening the tamper detection circuit.

It is described a tamper detection device for detecting tampering with respect to a packaging, the device comprising: i) a first electrode comprising a first patterned structure, and ii) a second electrode comprising a second patterned structure. The first electrode and the second electrode are arranged so that the first patterned structure and the second patterned structure are at least partially opposite to each other. In a first arrangement state of the first patterned structure and the second patterned structure with respect to each other, a first capacitance is measurable, in a second arrangement state of the first patterned structure and the second patterned structure with respect to each other, a second capacitance is measurable, wherein the first capacitance is different from the second capacitance, and wherein the first arrangement state is different from the second arrangement state. The device further comprising: iii) a detection unit, wherein the detection unit is configured to: a) measure the capacitance between the first electrode and the second electrode, b) obtain, based on the measured capacitance, an information indicative of the arrangement state, and c) evaluate, based on the information indicative of the arrangement state, if a tampering with respect to the packaging is detected.

A self-powering tamper detection system architecture includes a power source, a tamper detector configured to identify a tamper event, a tamper switch electrically connected to the power source and mechanically connected to the tamper detector, a tamper controller configured to produce a tamper response when the tamper event is identified, and program memory configured to store program data. The tamper detector is configured to mechanically actuate the tamper switch when a tamper event occurs, and the tamper response provides a disruption of the program data. The tamper detector and the tamper switch can include printed circuit board and embedded transformer, whereby the embedded transformer includes an axially-moveable ferromagnetic core.

A guard sensor injects a multi-GHz (multi giga-bit) guard signal along a guard signal transmission path above an observable knee in the amplitude response of the path to define a guarded region and to detect physical or electromagnetic intrusions of that guarded region. At frequencies above the knee, the signal transmission path exhibits increasingly non-linear and even chaotic behavior that improves the overall sensitivity of the sensor and its ability to detect slight changes in the distributed transmission parameters that characterize circuit devices, signal paths and signals. The guarded region may be used to protect a combination of circuit devices, physical connections, interfaces, high and low frequency signal transmission paths and signals.

The invention relates to a seal containing a substrate which can be applied to an object to be sealed, so that said seal is changed when it is removed without authorization, wherein the substrate contains or comprises a polymer and/or a glass and at least one optical waveguide is arranged in the substrate, at least one first Bragg grating being arranged in said optical waveguide, wherein the substrate has a thickness of less than 200 m. The invention further relates to a system having a seal of this kind and having an evaluation device, and also to a sealing method.

Manufacturing a batch is provided which includes a plurality of items of an electronic device, the items including a plurality of corresponding main modules having a same functional structure substantially identical for the items. The method includes defining at least one security electric circuit, of an enclosure component for enclosing each item, adapted to protect the item from tampering, the security electric circuits having individual configurations substantially different among the items, for use in forming the security electric circuit with the corresponding configuration on each enclosure component. Additionally, the method includes determining one or more electric characteristics of each security electric circuit for use in configuring a monitoring circuit of the corresponding main module, the monitoring circuit being adapted to the corresponding security electric circuit for detecting the tampering, according to the electric characteristics of the corresponding security circuits.

An electronic seal (e-seal) device and related techniques are disclosed. In accordance with some embodiments, the disclosed e-seal device may be configured to e-seal a given host platform. The disclosed e-seal device may include a radio frequency (RF) wireless transmitter configured, in accordance with some embodiments, to transmit a signal including data that may be compared against data from a server database in determining whether the e-seal has been compromised. When received by an authorized recipient within range, information from the signal may be delivered through the internet to the server database, which may be cloud-based in some instances, allowing for inter-networking of the system components and other elements as part of the internet of things (IOT). Reader and other computing devices may access the information stored at the server database to monitor and track the e-sealed platform, as well as control overall system operation.

A self-powering tamper detection system architecture includes a power source, a tamper detector configured to identify a tamper event, a tamper switch electrically connected to the power source and mechanically connected to the tamper detector, a tamper controller configured to produce a tamper response when the tamper event is identified, and program memory configured to store program data. The tamper detector is configured to mechanically actuate the tamper switch when a tamper event occurs, and the tamper response provides a disruption of the program data. The tamper detector and the tamper switch can include printed circuit board and embedded transformer, whereby the embedded transformer includes an axially-moveable ferromagnetic core.