Patents by Inventor Fabien Gremaud

Fabien Gremaud 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).

  • Publication number: 20250112791
    Abstract: A method, device, and computer-readable medium for provisioning a networked device with digital security credentials, including receiving a first digital certificate of a secure component associated with the networked device; extracting a public key of from the first digital certificate, the public key and a corresponding private key being stored in the secure component for asymmetric cryptography; receiving a product identifier and a vendor identifier associated with the secure component from a first user device; generating a second digital certificate based on the public key of the secure component, the product identifier, and the vendor identifier; and transmitting the second digital certificate to the networked device associated with the secure component, the networked device being configured to generate a device commissioning request based on the second digital certificate and the private key of the secure component.
    Type: Application
    Filed: September 27, 2024
    Publication date: April 3, 2025
    Applicant: NAGRAVISION SÀRL
    Inventor: Fabien GREMAUD
  • Patent number: 12255986
    Abstract: A computer-implemented method for use by a client device is provided. The client device comprises a memory and is configured to send data according to a cryptographic protocol that uses a key. The method comprises: generating a data unit and a seed related to the data unit; generating a measurement result of the client device related to the seed; generating an attestation key based on the measurement result and a key that is agreed in accordance with the cryptographic protocol; encrypting the data unit at least in part based on the attestation key; and generating an output comprising the encrypted data unit. Related methods for use by a server device and a network component, and related client device, server device and network component are also provided.
    Type: Grant
    Filed: November 29, 2019
    Date of Patent: March 18, 2025
    Assignee: Nagravision Sárl
    Inventor: Fabien Gremaud
  • Patent number: 12244691
    Abstract: The present disclosure includes methods, devises and systems for preparing and installing one or more application keys owned by application owners in a remote device. The present disclosure further proposes methods, devices and systems for secure installation of subsequent application keys on a device utilising corresponding key derivation functions to associate an application with a respective policy and identifier using significantly lmv bandwidth for transfer of keys for execution of the respective application on the device.
    Type: Grant
    Filed: December 15, 2023
    Date of Patent: March 4, 2025
    Assignee: NAGRAVISION SÀRL
    Inventors: Jean-Bernard Fischer, Nicolas Fischer, Fabien Gremaud, Karine Villegas
  • Patent number: 12212579
    Abstract: In overview, a computer-implemented method of transmitting data in a data stream from a first device to a second device is disclosed. The data stream is encrypted before transmission from the first device to the second device, and a location of the data in the data stream is indicated to the second device. The location may be a pre-shared location between the first and second devices, or the first device may transmit the location of the data to the second device. The second device decrypts the encrypted data stream, identifies the data in the data stream based on the location, and encrypts the identified data in the data stream.
    Type: Grant
    Filed: July 17, 2023
    Date of Patent: January 28, 2025
    Assignee: NAGRAVISION Sàrl
    Inventors: Fabien Gremaud, Frederic Thomas, Jean-Bernard Fischer
  • Publication number: 20240414529
    Abstract: The present disclosure proposes method and systems for establishing secure communication session(s) between a first device and a second device, where the first device operates in a user network and implements a first key exchange protocol for secure communication. The second device is capable of communicating with the first device over a wireless communication network. The second device implements a second key exchange protocol that is different to the first key exchange protocol for secure communication. A proxy entity configured for implementing the first and the second key exchange protocols for secure communication is provided. The proxy entity is configured for generating and/or provisioning one or more session keys for the first and the second devices using the key exchange protocols specific to each device for establishing secure communication between the first and second device based on the generated session key(s).
    Type: Application
    Filed: June 20, 2024
    Publication date: December 12, 2024
    Applicant: NAGRAVISION SARL
    Inventors: Jean-Bernard FISCHER, Frederic THOMAS, Fabien GREMAUD
  • Publication number: 20240349233
    Abstract: A method for automated authorization within a restricted perimeter, comprising receiving, via processing circuitry, a digital credential of a first device, a location of the first device within the restricted perimeter, and an image of an area within the restricted perimeter; verifying the digital credential; identifying a presence of an occupant in the image; associating the occupant with the digital credential and the location of the first device based on the image; and authorizing the occupant based on the digital credential and the location of the first device.
    Type: Application
    Filed: April 14, 2023
    Publication date: October 17, 2024
    Applicant: NAGRAVISION SARL
    Inventors: Fabien GREMAUD, Serge DUBROVA
  • Patent number: 12074870
    Abstract: The disclosure relates to a method for sealing into a device (1) device information, which enable the secure functions of the device (1), managed by a RoT (2) of the device (1) by the security owner, furthermore to bootstrap the device (1) to a system (10) and to finally authenticate the combination of RoT (2) and device information in the device (1). This method has the minimum impact on the device (1) production flow.
    Type: Grant
    Filed: November 22, 2019
    Date of Patent: August 27, 2024
    Assignee: NAGRAVISION SÀRL
    Inventor: Fabien Gremaud
  • Publication number: 20240250805
    Abstract: The present disclosure includes methods, devises and systems for preparing and installing one or more application keys owned by application owners in a remote device. The present disclosure further proposes methods, devices and systems for secure installation of subsequent application keys on a device utilising corresponding key derivation functions to associate an application with a respective policy and identifier using significantly lmv bandwidth for transfer of keys for execution of the respective application on the device.
    Type: Application
    Filed: December 15, 2023
    Publication date: July 25, 2024
    Applicant: NAGRAVISION SARL
    Inventors: Jean-Bernard FISCHER, Nicolas FISCHER, Fabien GREMAUD, Karine VILLEGAS
  • Patent number: 12047771
    Abstract: The present disclosure proposes method and systems for establishing secure communication session (s) between a first device and a second device, where the first device operates in a user network and implements a first key exchange protocol for secure communication. The second device is capable of communicating with the first device over a wireless communication network. The second device implements a second key exchange protocol that is different to the first key exchange protocol for secure communication. A proxy entity configured for implementing the first and the second key exchange protocols for secure communication is provided. The proxy entity is configured for generating and/or provisioning one or more session keys for the first and the second devices using the key exchange protocols specific to each device for establishing secure communication between the first and second device based on the generated session key(s).
    Type: Grant
    Filed: December 2, 2019
    Date of Patent: July 23, 2024
    Assignee: NAGRAVISION S.A.
    Inventors: Jean-Bernard Fischer, Frederic Thomas, Fabien Gremaud
  • Publication number: 20240171650
    Abstract: A method for notifying at least one client module implemented in a wireless device communicatively connected to a wireless communications network that respective specific data are available in a service module implemented in a server communicatively connected to the wireless communications network. According to the method, a notification client device implemented in the wireless device executes: receiving a notification, sent by a notification service device implemented in a server communicatively connected to the wireless network, including information that, for at least one client module, respective specific data are available in a server communicatively connected to the wireless communications network, and notifying the at least one client module that respective specific data are available in a server.
    Type: Application
    Filed: November 20, 2023
    Publication date: May 23, 2024
    Applicant: NAGRAVISION Sàrl
    Inventors: Fabien GREMAUD, Juan-Ramon HERNANDEZ, Frédéric THOMAS, Gilles RUSS, Luc DEVALLONNÉ
  • Publication number: 20240107311
    Abstract: A method of controlling access to sensor data includes of: generating sensor data, and protecting the sensor data to generate protected sensor data; and transmitting the protected sensor data to a device for storage; receiving, by the sensor: access control data defining one or more operations which the device is permitted to execute on the protected sensor data; determining by the sensor, based on the access control data, an operation which the device is permitted to execute on the protected sensor data; enabling the device to execute the permitted operation on the protected sensor data.
    Type: Application
    Filed: February 18, 2022
    Publication date: March 28, 2024
    Applicant: NAGRAVISION SARL
    Inventor: Fabien GREMAUD
  • Publication number: 20240022575
    Abstract: In overview, a computer-implemented method of transmitting data in a data stream from a first device to a second device is disclosed. The data stream is encrypted before transmission from the first device to the second device, and a location of the data in the data stream is indicated to the second device. The location may be a pre-shared location between the first and second devices, or the first device may transmit the location of the data to the second device. The second device decrypts the encrypted data stream, identifies the data in the data stream based on the location, and encrypts the identified data in the data stream.
    Type: Application
    Filed: July 17, 2023
    Publication date: January 18, 2024
    Inventors: Fabien GREMAUD, Frederic THOMAS, Jean-Bernard FISCHER
  • Patent number: 11876895
    Abstract: The present disclosure includes methods, devises and systems for preparing and installing one or more application keys owned by application owners in a remote device. The present disclosure further proposes methods, devices and systems for secure installation of subsequent application keys on a device utilising corresponding key derivation functions to associate an application with a respective policy and identifier using significantly Imv bandwidth for transfer of keys for execution of the respective application on the device.
    Type: Grant
    Filed: September 9, 2022
    Date of Patent: January 16, 2024
    Assignee: NAGRAVISION SARL
    Inventors: Jean-Bernard Fischer, Nicolas Fischer, Fabien Gremaud, Karine Villegas
  • Patent number: 11768643
    Abstract: A consumable can be used to securely send data to devices. A security platform can produce a consumable, for example an ink cartridge, with data to be uploaded onto a device, such as a printer. If the consumable and device can perform a successful authentication, broadcast data can be delivered to the device via the consumable. Such techniques can help ensure that authentic consumables are being used in authentic devise. Further, such techniques can enable a licensing model where different consumables can be configured with different data to enable or disable different features of the device.
    Type: Grant
    Filed: March 5, 2021
    Date of Patent: September 26, 2023
    Assignee: NAGRAVISION S.A.
    Inventor: Fabien Gremaud
  • Patent number: 11750620
    Abstract: In overview, a computer-implemented method of transmitting data in a data stream from a first device to a second device is disclosed. The data stream is encrypted before transmission from the first device to the second device, and a location of the data in the data stream is indicated to the second device. The location may be a pre-shared location between the first and second devices, or the first device may transmit the location of the data to the second device. The second device decrypts the encrypted data stream, identifies the data in the data stream based on the location, and encrypts the identified data in the data stream.
    Type: Grant
    Filed: November 28, 2019
    Date of Patent: September 5, 2023
    Assignee: Nagravision Sàrl
    Inventors: Fabien Gremaud, Frederic Thomas, Jean-Bernard Fischer
  • Patent number: 11741198
    Abstract: The present invention relates to a system for rendering a content, the rendering of which is subject to conditional access security conditions. A system is described, comprising a host device and a detachable security device, the security device configured to decrypt the encrypted content, re-encrypt it under a local key and to deliver the re-encrypted content to the host device while ensuring that the host device applies or otherwise enforces any conditions associated with the rendering of the content.
    Type: Grant
    Filed: November 18, 2021
    Date of Patent: August 29, 2023
    Assignee: NAGRAVISION S.A.
    Inventors: Philippe Desarzens, Fabien Gremaud, Jean-Luc Bussy
  • Publication number: 20230205934
    Abstract: A secure element has a secure processor for securely processing the digital information stored in a memory external to the secure element, and a loading and pre-processing system configured to load the digital information from the external memory into the secure element, and pre-process said digital information by executing a cryptographic algorithm before processing said digital information by the secure processor. The system reads a version number of the digital information that has been loaded, from an internal memory of the secure element, and uses said version number in executing the cryptographic algorithm.
    Type: Application
    Filed: April 27, 2021
    Publication date: June 29, 2023
    Applicant: Nagravision Sàrl
    Inventors: Karine VILLEGAS, Roan HAUTIER, Fabien GREMAUD, Pascal FUCHS
  • Publication number: 20230153470
    Abstract: A method is provided in which digital information is stored in a plurality of segments in an external memory. The method is performed by a processing device and comprises the steps of loading a first integrity table containing a plurality of first integrity elements respectively authenticating the plurality of segments of digital information, and an associated digital signature of the plurality of first integrity elements, from the external memory; verifying the digital signature associated with the first integrity table, and loading segments of digital information in a protected form from the external memory to the processing device.
    Type: Application
    Filed: April 19, 2021
    Publication date: May 18, 2023
    Applicant: NAGRAVISION SARL
    Inventors: Karine VILLEGAS, Roan HAUTIER, Pascal FUCHS, Fabien GREMAUD
  • Patent number: 11611791
    Abstract: A method to transfer a video stream from a host device comprising a controller configured for bulk transfers to a descrambling device, comprises: forming a chain out transfer comprising a chain out header linked with multiple chain out descriptors, the first chain out descriptor pointing to an out description packet containing at least one producer ID, the second and subsequent chain out descriptor pointing to chunks from the video stream, the last chain out descriptor being configured to generate an interrupt; forming a chain in transfer comprising a chain in header linked with a plurality of chain in descriptors, each chain in descriptor pointing to a descrambled chunk; requesting the controller to process the chain; receiving the description packet by the descrambling device and using key data associated with the chunks to descramble them; receiving by the controller the descrambled chunks and triggering an interrupt on the last chunk.
    Type: Grant
    Filed: January 15, 2021
    Date of Patent: March 21, 2023
    Assignee: NAGRAVISION S.A.
    Inventor: Fabien Gremaud
  • Publication number: 20230070124
    Abstract: The present disclosure includes methods, devises and systems for preparing and installing one or more application keys owned by application owners in a remote device. The present disclosure further proposes methods, devices and systems for secure installation of subsequent application keys on a device utilising corresponding key derivation functions to associate an application with a respective policy and identifier using significantly Imv bandwidth for transfer of keys for execution of the respective application on the device.
    Type: Application
    Filed: September 9, 2022
    Publication date: March 9, 2023
    Applicant: NAGRAVISION S.A.
    Inventors: Jean-Bernard FISCHER, Nicolas FISCHER, Fabien GREMAUD, Karine VILLEGAS