Levl Technologies, Inc.

Levl Parent, LLC

Nuriel Rogel

Gal Itzhak

Dmitry Blokh

Daniel Zahavi

Michael Estrin

Noam Janco

A computer-implemented method comprising: receiving, by a first radio frequency (RF) receiving device, an RF data transmission from an RF transmitter; analyzing the received RF data transmission to estimate at least one RF feature; constructing, based on the at least one RF feature, an RF fingerprint of the RF transmitter which is specific to the first RF receiving device; and modifying the RF fingerprint to generate a modified RF fingerprint for use by a second RF receiving device, by applying, to the RF fingerprint, a conversion function reflecting a differential between respective contribution values associated with each of the first and second receiving devices.

Radio frequency fingerprinting within dynamic network topology

A computer-implemented method comprising: monitoring transmissions representing estimation of a wireless channel, between at least one wireless access point (AP) and a plurality of wireless stations (STAs); at a training stage, training a machine learning model on a training dataset comprising: (i) a plurality dataframes of a standard beamforming protocol associated with at least some of the monitored transmissions, and (ii) labels indicating an association between the dataframes and the STAs; and at an inference stage, applying the trained machine learning model to a target transmission representing estimation of a wireless channel, to predict whether the target transmission was transmitted from one of the STAs.

System and method for radio frequency fingerprinting

A system including at least one hardware processor; and a non-transitory computer-readable storage medium having stored thereon program instructions, the program instructions executable by the at least one hardware processor to: receive, using a first transceiver, a radio-frequency (RF) transmission from an RF device; extract, from said RF transmission, at least one of: (i) noise samples from one or more segments of said RF transmission, and (ii) signal samples from one or more segments of said RF transmission; and determine the presence of a second transceiver in the path of said RF transmission, based, at least in part, on processing said extracted noise samples and signal samples.

Relay attack prevention

A system comprising: at least one hardware processor; and a non-transitory computer-readable storage medium having program code embodied therewith, the program code executable by the at least one hardware processor for: receiving, by a radio frequency (RF) receiver, an RF transmission from an RF transmitter, wherein the RF transmission (a) is modulated in accordance with a specified modulation scheme, and (b) comprises a digital data packet; demodulating the RF transmission to produce a time series of bits that form the digital data packet; and processing the time series of bits to estimate at least one of (i) CFO of the RF transmitter, and (ii) modulation index of the RF transmitter.

Carrier frequency estimation for radio frequency fingerprinting

A method including operating at least one hardware processor for: receiving, using a first transceiver, a radio-frequency (RF) transmission from an RF device; extracting one or more signal samples from said RF transmission, wherein the signal samples are associated with at least one of: (i) a rise transient associated with a data packet of said RF transmission, (ii) a fall transient associated with the data packet, and (iii) a region of the RF transmission occurring between the rise transient and the fall transient; and determining the presence of a second transceiver in the path of the RF transmission, based, at least in part, on processing the signal samples.

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Rehovot, Israel

Nuriel Rogel