Patents by Inventor Kamran Sharifi
Kamran Sharifi 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: 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: 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: 20230267472Abstract: A transaction device can implement a monitoring system to detect for tamper attempts at a chip card interface. The monitoring system can establish a baseline when no chip card is present in the chip card interface, or in some embodiments, when it is known that an authentic chip card is present in the slot. During subsequent evaluations of the chip card interface by the monitoring system, a response received by the monitoring system that deviates from the baseline can indicate that a tamper attempt at the chip card interface may have occurred. If a tamper attempt is determined by the monitoring system, a remedial or corrective action can be taken.Type: ApplicationFiled: April 20, 2023Publication date: August 24, 2023Applicant: Block, Inc.Inventors: Afshin Rezayee, Malcolm Smith, Yue Yang, Jeremy Wade, Max Guise, Kamran Sharifi
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Patent number: 11669842Abstract: A transaction chip can exchange information with a chip card during a payment transaction. The transaction chip can incorporate a processing unit, a memory device, a contact interface and power and communication circuitry. The transaction chip can acquire payment information from the chip card when the EMV chip of the chip card is interfaced with the power and communication circuitry of the transaction chip via the contact interface.Type: GrantFiled: July 2, 2021Date of Patent: June 6, 2023Assignee: Block, Inc.Inventors: Afshin Rezayee, Malcolm Smith, Yue Yang, Jeremy Wade, Max Guise, Kamran Sharifi
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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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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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Publication number: 20210334807Abstract: A payment processing device can implement a monitoring system to detect for tamper attempts at a chip card interface. The monitoring system can establish a baseline when no chip card is present in the chip card interface, or in some embodiments, when it is known that an authentic chip card 14 is present in the slot 21. During subsequent evaluations of the chip card interface by the monitoring system, a response received by the monitoring system that deviates from the baseline can indicate that a tamper attempt at the chip card interface may have occurred. If a tamper attempt is determined by the monitoring system, a remedial or corrective action can be taken.Type: ApplicationFiled: July 2, 2021Publication date: October 28, 2021Applicant: Square, Inc.Inventors: Afshin Rezayee, Malcolm Smith, Yue Yang, Jeremy Wade, Max Guise, Kamran Sharifi
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Patent number: 11113698Abstract: A payment processing device can implement a monitoring system to detect for tamper attempts at a chip card interface. The monitoring system can establish a baseline when no chip card is present in the chip card interface, or in some embodiments, when it is known that an authentic chip card 14 is present in the slot 21. During subsequent evaluations of the chip card interface by the monitoring system, a response received by the monitoring system that deviates from the baseline can indicate that a tamper attempt at the chip card interface may have occurred. If a tamper attempt is determined by the monitoring system, a remedial or corrective action can be taken.Type: GrantFiled: March 5, 2020Date of Patent: September 7, 2021Assignee: Square, Inc.Inventors: Afshin Rezayee, Malcolm Smith, Yue Yang, Jeremy Wade, Max Guise, Kamran Sharifi
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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: 20200202357Abstract: A payment processing device can implement a monitoring system to detect for tamper attempts at a chip card interface. The monitoring system can establish a baseline when no chip card is present in the chip card interface, or in some embodiments, when it is known that an authentic chip card 14 is present in the slot 21. During subsequent evaluations of the chip card interface by the monitoring system, a response received by the monitoring system that deviates from the baseline can indicate that a tamper attempt at the chip card interface may have occurred. If a tamper attempt is determined by the monitoring system, a remedial or corrective action can be taken.Type: ApplicationFiled: March 5, 2020Publication date: June 25, 2020Applicant: Square, Inc.Inventors: Afshin Rezayee, Malcolm Smith, Yue Yang, Jeremy Wade, Max Guise, Kamran Sharifi
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Patent number: 10621590Abstract: A payment processing device can implement a monitoring system to detect for tamper attempts at a chip card interface. The monitoring system can establish a baseline when no chip card is present in the chip card interface, or in some embodiments, when it is known that an authentic chip card 14 is present in the slot 21. During subsequent evaluations of the chip card interface by the monitoring system, a response received by the monitoring system that deviates from the baseline can indicate that a tamper attempt at the chip card interface may have occurred. If a tamper attempt is determined by the monitoring system, a remedial or corrective action can be taken.Type: GrantFiled: February 22, 2017Date of Patent: April 14, 2020Assignee: Square, Inc.Inventors: Afshin Rezayee, Malcolm Smith, Yue Yang, Jeremy Wade, Max Guise, Kamran Sharifi
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Patent number: 10438189Abstract: A payment processing device can implement a monitoring system to detect for tamper attempts at a physical interface such as a chip card interface. The monitoring system can establish local tamper criteria including a baseline when no chip card is present in the chip card interface, or in some embodiments, when it is known that an authentic chip card is present in the slot. During subsequent evaluations of the chip card interface by the monitoring system, a response received by the monitoring system that deviates from the local test criteria can indicate that a tamper attempt at the chip card interface may have occurred. The payment processing device may also communicate test results to a server for further testing, or for an update of the local test criteria.Type: GrantFiled: February 22, 2017Date of Patent: October 8, 2019Assignee: Square, Inc.Inventors: Afshin Rezayee, Malcolm Smith, Yue Yang, Jeremy Wade, Max Guise, Kamran Sharifi
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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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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: 20180240103Abstract: A payment processing device can implement a monitoring system to detect for tamper attempts at a physical interface such as a chip card interface. The monitoring system can establish local tamper criteria including a baseline when no chip card is present in the chip card interface, or in some embodiments, when it is known that an authentic chip card is present in the slot. During subsequent evaluations of the chip card interface by the monitoring system, a response received by the monitoring system that deviates from the local test criteria can indicate that a tamper attempt at the chip card interface may have occurred. The payment processing device may also communicate test results to a server for further testing, or for an update of the local test criteria.Type: ApplicationFiled: February 22, 2017Publication date: August 23, 2018Applicant: Square, Inc.Inventors: Afshin Rezayee, Malcolm Smith, Yue Yang, Jeremy Wade, Max Guise, Kamran Sharifi
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Publication number: 20180240117Abstract: A payment processing device can implement a monitoring system to detect for tamper attempts at a chip card interface. The monitoring system can establish a baseline when no chip card is present in the chip card interface, or in some embodiments, when it is known that an authentic chip card 14 is present in the slot 21. During subsequent evaluations of the chip card interface by the monitoring system, a response received by the monitoring system that deviates from the baseline can indicate that a tamper attempt at the chip card interface may have occurred. If a tamper attempt is determined by the monitoring system, a remedial or corrective action can be taken.Type: ApplicationFiled: February 22, 2017Publication date: August 23, 2018Applicant: Square, Inc.Inventors: Afshin Rezayee, Malcolm Smith, Yue Yang, Jeremy Wade, Max Guise, Kamran Sharifi
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Patent number: 9219951Abstract: A mobile TV system architecture for a mobile terminal that reduces the processing required by the main processor during reception of digital broadcasts such as DVB-H. The mobile terminal architecture includes a main processor system and a mobile TV receiver device. The mobile TV receiver device includes units for SI/PSI processing, IP processing and decryption engine. The SI/PSI (service information/program specific information) processing unit receives non-protected transport stream (TS) packets and extracts SI/PSI tables which can be stored in memory local to the receiver device. The IP processing unit receives decrypted error-corrected protected packets containing multimedia content. The receiver device may include an HTTP server for communicating with a browser application running on the main processor system. The browser application presents multimedia content, received via HTTP, corresponding to a URL entered or selected by a user.Type: GrantFiled: June 11, 2008Date of Patent: December 22, 2015Assignee: ANALOG DEVICES, INC.Inventor: Kamran Sharifi
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Publication number: 20090100475Abstract: A mobile TV system architecture for a mobile terminal that reduces the processing required by the main processor during reception of digital broadcasts such as DVB-H. The mobile terminal architecture includes a main processor system and a mobile TV receiver device. The mobile TV receiver device includes units for SI/PSI processing, IP processing and decryption engine. The SI/PSI (service information/program specific information) processing unit receives non-protected transport stream (TS) packets and extracts SI/PSI tables which can be stored in memory local to the receiver device. The IP processing unit receives decrypted error-corrected protected packets containing multimedia content. The receiver device may include an HTTP server for communicating with a browser application running on the main processor system. The browser application presents multimedia content, received via HTTP, corresponding to a URL entered or selected by a user.Type: ApplicationFiled: June 11, 2008Publication date: April 16, 2009Applicant: Analog Devices, Inc.Inventor: Kamran Sharifi