Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V.

Friedrich-Alexander-Universitat Erlangen-Nürnberg

Marc Fassbinder

Josef Bernhard

Gerd Kilian

Niels Hadaschik

Jörg Robert

Jörn Thielecke

Markus Hartmann

Sven Hafenecker

Nils Hadaschik

Hans-Martin TRÖGER

A method to determine a jitter attack on authorization system granting permission using a resource comprising: receiving at least three subcarrier signals from an authentication device, determining a relative phase deviation from an expected relative phase behavior for the at least three subcarrier signals, and concluding on a jitter attack if the relative phase deviation fulfills a predetermined criterion.

Method for determining a jitter attack, jitter attack detecting device, and computer program

A method to determine a relay attack on an authorization system granting permission on using a resource, includes receiving a signal from an authentication device; determining, whether at least two copies of an authentication signal are included in the signal; and concluding on a relay attack if at least two copies of the authentication signal are identified in the signal.

Method for determining a relay attack, relay attack detecting device, and computer program

The invention concerns a method and a receiver configured to receive a radio signal carrying information, the radio signal including an overall frequency band having at least three different sub carriers. The receiver is further configured to receive, during a first time period, a first multitone signal carrying a first portion of the radio signal, the first multitone signal including a first and a second sub carrier which are received simultaneously, and to determine a first phase difference between the first and the second sub carrier. The receiver is further configured to receive, during a second time period, a second multitone signal carrying a second portion of the radio signal, the second multitone signal including the second and a third sub carrier which are received simultaneously, and to determine a second phase difference between the second and the third sub carrier. According to the invention, the receiver is configured to determine a phase difference between the first and the third sub carrier using the first phase difference and the second phase difference.

Receiver and method for providing a phase coherency for frequency hopping multitone signals

A transmit arrangement () for generating a signal pattern suitable for a localization comprises a first antenna () and at least one second antenna () spatially separated from the first antenna. A transmit apparatus () of the transmit arrangement () is configured to generate a known signal form and to transmit the known signal form by means of a transmit signal via the first and second antennas ().

Transmit arrangement for generating a signal pattern suitable for localization and receive arrangement for executing a localization

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Erlangen, Germany

Marc Fassbinder