摘要:
A method for masking communication signals, particularly for masking terrestrial RF communication signals on board of an aircraft, includes parallelizing a first information data stream to be transmitted on a first LTE transmission channel. The first LTE transmission channel has a first channel transmission bandwidth and at least one guard band adjacent to the channel transmission bandwidth. The first information data stream is spread over mutually orthogonal data subcarriers within the first channel transmission bandwidth. A CAZAC sequence is generated. The generated CAZAC sequence is spread over guard band subcarriers within the at least one guard band. The first information data stream is transmitted over the data subcarriers in parallel to the CAZAC sequence over the guard band subcarriers.
摘要:
Devices and methods of disrupting data transfer between an RFID interrogation device (50, 50′) and an RFID data storage device (30, 30′) to be protected, are provided. An example of an embodiment of an RFID signal disruptor device includes a container (41, 141) and an RFID signal disruptor circuit (151, 161, 161′, 171, 171′, 271, 271′) configured to substantially disrupt the signal provided by the RFID interrogation device (50, 50′) when the RFID signal disruptor device is positioned to protect the RFID data storage device (30, 30′). The RFID signal disruptor device can also include an interrogation indicator (63, 296) configured to indicate to a user of the RFID data storage device (30, 30′) that an unauthorized RFID interrogation device (50, 50′) is attempting to interrogate the RFID data storage device (30, 30′) when the RFID signal disruptor device is positioned in close proximity to the RFID data storage device (30, 30′) to provide protection thereto and when the RFID interrogation device (50, 50′) is producing the interrogation signal.
摘要:
Distance-based authentication is provided for mitigating undesirable interaction and/or attacks upon ranging systems, such as those involving vehicle entry or secure payment. As may be implemented in accordance with one or more embodiments, a leading edge of one or more pulses in a waveform of a signal is obscured as part of distance-based authentication. For instance, noise may be generated via a noise modulation circuit and combined with some or all of a leading edge of a pulse. Distance-based authentication is provided by transmitting a signal with a waveform having the obscured portion of the leading edge, which operates to mitigate detection of the polarity of the leading edge or otherwise of the leading edge itself.
摘要:
A jamming device for inhibiting unauthorised contactless reading of a contactless readable object is disclosed. In one embodiment, the jamming device includes: an antenna for receiving an interrogation signal from a reader device; a touch sensitive interface; and a circuit electrically connected to the antenna and the touch sensitive interface, wherein the circuit is configured to: operate in a first mode to generate and emit a jamming signal, via the antenna, in response to receiving the interrogation signal whilst the touch sensitive interface fails to indicate a touch event; and operate in a second mode whilst the touch sensitive interface indicates a touch event, wherein the jamming signal is not emitted via the antenna in response to receiving the interrogation signal whilst operating in the second mode. A card carrying object, system and method is also disclosed.
摘要:
Devices and methods of disrupting data transfer between an RFID interrogation device (50, 50′) and an RFID data storage device (30, 30′) to be protected, are provided. An example of an embodiment of an RFID signal disruptor device includes a container (41, 141) and an RFID signal disruptor circuit (151, 161, 161′, 171, 171′, 271, 271′) configured to substantially disrupt the signal provided by the RFID interrogation device (50, 50′) when the RFID signal disruptor device is positioned to protect the RFID data storage device (30, 30′). The RFID signal disruptor device can also include an interrogation indicator (63, 296) configured to indicate to a user of the RFID data storage device (30, 30′) that an unauthorized RFID interrogation device (50, 50′) is attempting to interrogate the RFID data storage device (30, 30′) when the RFID signal disruptor device is positioned in close proximity to the RFID data storage device (30, 30′) to provide protection thereto and when the RFID interrogation device (50, 50′) is producing the interrogation signal.
摘要:
Devices and methods of disrupting data transfer between an RFID interrogation device (50, 50′) and an RFID data storage device (30, 30′) to be protected, are provided. An example of an embodiment of an RFID signal disruptor device includes a container (41, 141) and an RFID signal disruptor circuit (151, 161, 161′, 171, 171′, 271, 271′) configured to substantially disrupt the signal provided by the RFID interrogation device (50, 50′) when the RFID signal disruptor device is positioned to protect the RFID data storage device (30, 30′). The RFID signal disruptor device can also include an interrogation indicator (63, 296) configured to indicate to a user of the RFID data storage device (30, 30′) that an unauthorized RFID interrogation device (50, 50′) is attempting to interrogate the RFID data storage device (30, 30′) when the RFID signal disruptor device is positioned in close proximity to the RFID data storage device (30, 30′) to provide protection thereto and when the RFID interrogation device (50, 50′) is producing the interrogation signal.
摘要:
A Radio Frequency Identification (RFID) reader configured to perform self-jammer cancellation (SJC) may include an SJC module coupled to a low-noise amplifier (LNA), which in turn may be coupled to a mixer via an LNA-mixer interface. The interface may be implemented with a horizontal matching circuit that includes four inductors magnetically and direct-current (DC) coupled to each other. In some embodiments, the inductors may each be implemented using a different segment of a single inductor.
摘要:
A banking system is controlled responsive to data read from data bearing records. The system comprises an automated banking machine. The machine includes at least one type of data reader, which includes a card reader. The machine also includes an anti-fraud arrangement that can deter effective operation of unauthorized devices attached to the machine. Such unauthorized devices may include a fraudulent card reader placed adjacent to a card entry slot that leads to the card reader. The arrangement can sense a fraudulent card reader installed on the machine. The arrangement can additionally emit jamming signals that interfere with an ability of a sensed fraudulent card reader to accurately read card data.
摘要:
Devices and methods of disrupting data transfer between an RFID interrogation device (50, 50′) and an RFID data storage device (30, 30′) to be protected, are provided. An example of an embodiment of an RFID signal disruptor device includes a container (41, 141) and an RFID signal disruptor circuit (151, 161, 161′, 171, 171′, 271, 271′) configured to substantially disrupt the signal provided by the RFID interrogation device (50, 50′) when the RFID signal disruptor device is positioned to protect the RFID data storage device (30, 30′). The RFID signal disruptor device can also include an interrogation indicator (63, 296) configured to indicate to a user of the RFID data storage device (30, 30′) that an unauthorized RFID interrogation device (50, 50′) is attempting to interrogate the RFID data storage device (30, 30′) when the RFID signal disruptor device is positioned in close proximity to the RFID data storage device (30, 30′) to provide protection thereto and when the RFID interrogation device (50, 50′) is producing the interrogation signal.
摘要:
A system and methods for location-based authentication using medium earth orbit (MEO) and low earth orbit (LEO) satellites are presented. Location of a client device is authenticated based on at least one client received MEO satellite signal received from at least one MEO satellite at the client device and at least one client received LEO satellite signal received from at least one LEO satellite at the client device.