Patents by Inventor Bertram Leesti
Bertram Leesti has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20240015005Abstract: A hashing system includes data storage circuit elements that store words to be used for hashing a message. Each data storage circuit element stores a word without moving the word to any other data storage circuit element during hashing. The hashing system includes combinational logic circuit element(s) that select specified data storage circuit elements according to a specified order that simulates shifting of at least a subset of the words among the data storage circuit elements, for instance based on an order in which the words were stored and/or based a clock. The hashing system includes computational operator(s) that generate additional word(s) based on the selected specified words. The hashing system stores the additional word(s) into available data storage circuit element(s), in some cases overwriting prior word(s) that were stored in the available data storage circuit element(s). The hashing system can include a message expander (ME) and/or message compressor (MC).Type: ApplicationFiled: July 6, 2022Publication date: January 11, 2024Inventors: William Song, Yue Yang, Bertram Leesti, Mehrdad Ramezani, Afshin Rezayee, Kajornsak Julavittayanukool, Weili Chen
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Publication number: 20230410086Abstract: A system for sensing a proximity of a near field communication (NFC) device includes an NFC reader that communicates with a remote NFC device through load modulation. The NFC reader transmits a wireless carrier signal from an antenna, and the remote NFC device modulates the carrier signal by changing its internal impedance in order to transmit data to the NFC reader. The NFC reader has at least one antenna for receiving the modulated signal. The antenna is coupled to circuitry that analyzes the signal received from the remote NFC device The circuitry then identifies a resonant frequency for the remote NFC device based on the received signal and controls transmission characteristics of the NFC reader for communicating with the remote NFC device based on the identified resonant frequency.Type: ApplicationFiled: September 1, 2023Publication date: December 21, 2023Applicant: Block, Inc.Inventors: Haipeng Yan, Emad Bidari, Bertram Leesti, Afshin Rezayee
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Publication number: 20230401561Abstract: An electronic device may include a printed circuit board having a physically unclonable function (PUF) source. The electronic device may also include processing circuitry positioned on the printed circuit board. The PUF source includes a plurality of traces and each trace includes a first portion and a second portion having an increased surface area relative to the first portion. The PUF source is responsive to an input from the processing circuitry to provide PUF data based on the impedance characteristics of the plurality of traces. The processing circuitry is further configured to process the PUF data from the PUF source to perform an operation within the device.Type: ApplicationFiled: August 25, 2023Publication date: December 14, 2023Applicant: Block, Inc.Inventors: Kamran Sharifi, Jeremy Wade, Bertram Leesti, Afshin Rezayee, Yue Yang, Max Joseph Guise
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Patent number: 11783317Abstract: A near field communication (NFC) system includes an NFC reader that communicates with a remote NFC device through load modulation. The NFC reader transmits a wireless carrier signal from an antenna and has a plurality of passive receive antennas to receive the modulated signal. The NFC reader also has circuitry to provide a plurality of data streams that define data recovered from the modulated wireless carrier signal received from the plurality of receivers. The circuitry then selects, based on a location of the NFC device relative to the NFC reader, one of the plurality of data streams for use in processing a transaction.Type: GrantFiled: October 29, 2021Date of Patent: October 10, 2023Assignee: Block, Inc.Inventors: Haipeng Yan, Emad Bidari, Bertram Leesti, Afshin Rezayee
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Patent number: 11775958Abstract: An electronic device, such as a payment reader, may include a physically unclonable function (PUF) source to generate a plurality of PUF values. The electronic device may also include circuitry to compare the plurality of PUF values from the PUF source to determine a degree of randomness of the at least one PUF source in generating the plurality of PUF values. The circuitry can then determine, based on the determined degree of randomness, whether to use the PUF values from the PUF source to perform a secure operation for the electronic device.Type: GrantFiled: July 6, 2022Date of Patent: October 3, 2023Assignee: Block, Inc.Inventors: Kamran Sharifi, Jeremy Wade, Bertram Leesti, Afshin Rezayee, Yue Yang, Max Joseph Guise
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Publication number: 20220414646Abstract: An electronic device may include a printed circuit board having a physically unclonable function (PUF) source. The electronic device may also include an integrated circuit (IC) chip positioned on the printed circuit board, and the first PUF source may be embedded in or formed on the printed circuit board external to the IC chip. The IC chip has processing circuitry that is configured to determine PUF data based on the PUF source. The processing circuitry is further configured to determine a cryptographic key or authentication token based on the PUF data and to perform at least one secure operation using the cryptographic key or authentication token.Type: ApplicationFiled: July 6, 2022Publication date: December 29, 2022Applicant: Block, Inc.Inventors: Kamran Sharifi, Jeremy Wade, Bertram Leesti, Afshin Rezayee, Yue Yang, Max Joseph Guise
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Publication number: 20220230162Abstract: A system for sensing a proximity of a near field communication (NFC) device includes an NFC reader that communicates with a remote NFC device through load modulation. The NFC reader transmits a wireless carrier signal from an antenna, and the remote NFC device modulates such carrier signal by changing its internal impedance in order to transmit data to the NFC reader. The NFC reader has at least one antenna for receiving the modulated signal. This antenna is coupled to circuitry that measures a spectrum of the received signal and identifies a resonant frequency of the NFC device based on the measured spectrum. Such circuitry also determines the signal's amplitude at such resonant frequency and precisely estimates the distance of the remote NFC device from the reader based on such amplitude.Type: ApplicationFiled: October 29, 2021Publication date: July 21, 2022Applicant: Square, Inc.Inventors: Haipeng Yan, Emad Bidari, Bertram Leesti, Afshin Rezayee
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Patent number: 11386419Abstract: An electronic device may include a printed circuit board having a physically unclonable function (PUF) source. The electronic device may also include an integrated circuit (IC) chip positioned on the printed circuit board, and the first PUF source may be embedded in or formed on the printed circuit board external to the IC chip. The IC chip has processing circuitry that is configured to determine PUF data based on the PUF source. The processing circuitry is further configured to determine a cryptographic key or authentication token based on the PUF data and to perform at least one secure operation using the cryptographic key or authentication token.Type: GrantFiled: March 20, 2020Date of Patent: July 12, 2022Assignee: Block, Inc.Inventors: Kamran Sharifi, Jeremy Wade, Bertram Leesti, Afshin Rezayee, Yue Yang, Max Joseph Guise
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Patent number: 11182770Abstract: A system for sensing a proximity of a near field communication (NFC) device includes an NFC reader that communicates with a remote NFC device through load modulation. The NFC reader transmits a wireless carrier signal from an antenna, and the remote NFC device modulates such carrier signal by changing its internal impedance in order to transmit data to the NFC reader. The NFC reader has at least one antenna for receiving the modulated signal. This antenna is coupled to circuitry that measures a spectrum of the received signal and identifies a resonant frequency of the NFC device based on the measured spectrum. Such circuitry also determines the signal's amplitude at such resonant frequency and precisely estimates the distance of the remote NFC device from the reader based on such amplitude.Type: GrantFiled: December 12, 2018Date of Patent: November 23, 2021Assignee: Square, Inc.Inventors: Haipeng Yan, Emad Bidari, Bertram Leesti, Afshin Rezayee
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Patent number: 11018881Abstract: A device may include one or more sources such as circuit elements and electrical components that function as sources for physically unclonable function (PUF) data. PUF data may be acquired from the PUF sources and one or more error correction codes may be applied to the PUF data. The resulting PUF values may be used to generate information that may be used for device security operations such as encryption and tamper detection.Type: GrantFiled: January 31, 2018Date of Patent: May 25, 2021Assignee: Square, Inc.Inventors: Kamran Sharifi, Afshin Rezayee, Jeremy Wade, Yue Yang, Max Joseph Guise, Bertram Leesti
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Patent number: 10819528Abstract: A device may include one or more sources such as circuit elements and electrical components that function as sources for physically unclonable function (PUF) data. PUF data may be acquired from the PUF sources and one or more error correction codes may be applied to the PUF data. The resulting PUF values may be used to generate information that may be used for device security operations such as encryption and tamper detection.Type: GrantFiled: December 15, 2017Date of Patent: October 27, 2020Assignee: Square, Inc.Inventors: Kamran Sharifi, Afshin Rezayee, Jeremy Wade, Yue Yang, Max Joseph Guise, Bertram Leesti
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Publication number: 20200219085Abstract: An electronic device may include a printed circuit board having a physically unclonable function (PUF) source. The electronic device may also include an integrated circuit (IC) chip positioned on the printed circuit board, and the first PUF source may be embedded in or formed on the printed circuit board external to the IC chip. The IC chip has processing circuitry that is configured to determine PUF data based on the PUF source. The processing circuitry is further configured to determine a cryptographic key or authentication token based on the PUF data and to perform at least one secure operation using the cryptographic key or authentication token.Type: ApplicationFiled: March 20, 2020Publication date: July 9, 2020Applicant: Square, Inc.Inventors: Kamran Sharifi, Jeremy Wade, Bertram Leesti, Afshin Rezayee, Yue Yang, Max Joseph Guise
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Publication number: 20190028282Abstract: A device may include one or more sources such as circuit elements and electrical components that function as sources for physically unclonable function (PUF) data. PUF data may be acquired from the PUF sources and one or more error correction codes may be applied to the PUF data. The resulting PUF values may be used to generate information that may be used for device security operations such as encryption and tamper detection.Type: ApplicationFiled: December 15, 2017Publication date: January 24, 2019Inventors: Kamran Sharifi, Afshin Rezayee, Jeremy Wade, Yue Yang, Max Joseph Guise, Bertram Leesti
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Publication number: 20190028283Abstract: A device may include one or more sources such as circuit elements and electrical components that function as sources for physically unclonable function (PUF) data. PUF data may be acquired from the PUF sources and one or more error correction codes may be applied to the PUF data. The resulting PUF values may be used to generate information that may be used for device security operations such as encryption and tamper detection.Type: ApplicationFiled: January 31, 2018Publication date: January 24, 2019Inventors: Kamran Sharifi, Afshin Rezayee, Jeremy Wade, Yue Yang, Max Joseph Guise, Bertram Leesti
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Patent number: 8818209Abstract: A frequency decimation block for processing an analog input signal including a high-bandwidth data signal to generate a parallel set of parallel output signals, in which each output signal represents a respective portion of the high-bandwidth data signal. A preamplifier is provided for amplifying the input signal. A frequency domain divider divides the amplified input signal to generate a set of frequency band signals including a low frequency band signal, a mid-frequency band signal, and a high frequency band signal. Each frequency band signal is supplied to at least one signal path. A respective non-linear processor is connected in each of M signal paths processes the input signal using a respective branch signal to yield a corresponding composite signal. A respective Low-Pass Filter (LPF) is connected in each signal path, for low-pass filtering at least the composite signals to generate corresponding ones of the parallel output signals.Type: GrantFiled: June 19, 2012Date of Patent: August 26, 2014Assignee: Ciena CorporationInventors: William Martin Snelgrove, Kim B. Roberts, Bertram Leesti, Shahab Oveis Gharan, Mahmoud Taherzadehboroujeni