Patents by Inventor Christophe Buffard

Christophe Buffard 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: 20260230499
    Abstract: Aspects of the disclosure provide systems and methods to improve network security using VLAN splicing. A networking device can create multiple VLANs and place different devices on different VLANs. To enable communication between devices on different VLANs, the networking device “splices” two or more VLANs together. When packets originating from a device on a first VLAN are directed to a device on a second VLAN and the two VLANs are spliced together, the networking device processes and forwards the packets. For example, the packets may be decrypted using a decryption key of the first VLAN and encrypted using a decryption key of the second VLAN. For cross-VLAN packets of VLANs that are not spliced together, the networking device drops the packets.
    Type: Application
    Filed: March 13, 2026
    Publication date: August 6, 2026
    Applicant: NAGRAVISION SÀRL
    Inventors: Christophe BUFFARD, Nicolas MEYNET
  • Publication number: 20260220942
    Abstract: Methods and systems are described herein for authenticating streaming media, based on the use of computer vision or artificial intelligence. An untrained neural network generates a first feature vector from an identified image frame of a first media stream that is encoded with a first encoding scheme. The same or a similar untrained neural network generates a second feature vector from an identified image frame of a second media stream that is encoded with a second encoding scheme. The two encoding schemes do not need to be the same. The two feature vectors are compared, and the second media stream is presumed to be authentic if the differences between the two feature vectors is less than a predetermined threshold.
    Type: Application
    Filed: January 16, 2024
    Publication date: July 30, 2026
    Applicant: NAGRAVISION SARL
    Inventor: Christophe Buffard
  • Patent number: 12602453
    Abstract: A content owner registers with an identity authority by providing information about the content owner and a public key of a public/private key pair. The content owner registers content to the identity authority and signs the multiple segments of the content with the private key of the public/private key pair. A system that receives the signed content determines an indicated content owner of the received media content and communicates with the identity authority to confirm that the media content was produced by the indicated content owner. The receiving system requests the public key of the content owner from the identity authority and uses the public key to verify the signature of each media content segment. Accordingly, the receiving system is able to determine if the media content was manipulated after being distributed by the content owner.
    Type: Grant
    Filed: August 31, 2021
    Date of Patent: April 14, 2026
    Assignee: NAGRAVISION SÀRL
    Inventors: Christophe Buffard, Laura Buffard
  • Publication number: 20240195813
    Abstract: Aspects of the present disclosure address systems, methods, and devices for enabling secure communication between electronic control units (ECUs) in a vehicle. The system may include a first and second ECU from a plurality of ECUs in the vehicle. The first ECU is to enable secure communication between the plurality of ECUs by performing operations that include provisioning the second ECU with authentication data for authenticating messages exchanged with a third ECU and provisioning the third ECU with a set of security keys to enable the third ECU to securely exchange messages with the second ECU. The second ECU receives, from the third ECU, a secure message that is cryptographically signed using a security key from the set of security keys provisioned to the third ECU, and the second ECU authenticates the secure message by comparing the authentication data with an authentication signal.
    Type: Application
    Filed: December 20, 2023
    Publication date: June 13, 2024
    Inventors: Christophe Buffard, Sanjeev Sehgal
  • Patent number: 11916924
    Abstract: Aspects of the present disclosure address systems, methods, and devices for enabling secure communication between electronic control units (ECUs) in a vehicle. The system may include a first and second ECU from a plurality of ECUs in the vehicle. The first ECU is to enable secure communication between the plurality of ECUs by performing operations that include provisioning the second ECU with authentication data for authenticating messages exchanged with a third ECU and provisioning the third ECU with a set of security keys to enable the third ECU to securely exchange messages with the second ECU. The second ECU receives, from the third ECU, a secure message that is cryptographically signed using a security key from the set of security keys provisioned to the third ECU, and the second ECU authenticates the secure message by comparing the authentication data with an authentication signal.
    Type: Grant
    Filed: October 13, 2021
    Date of Patent: February 27, 2024
    Assignee: NAGRAVISION S.A.
    Inventors: Christophe Buffard, Sanjeev Sehgal
  • Publication number: 20230325473
    Abstract: A content owner registers with an identity authority by providing information about the content owner and a public key of a public/private key pair. The content owner registers content to the identity authority and signs the multiple segments of the content with the private key of the public/private key pair. A system that receives the signed content determines an indicated content owner of the received media content and communicates with the identity authority to confirm that the media content was produced by the indicated content owner. The receiving system requests the public key of the content owner from the identity authority and uses the public key to verify the signature of each media content segment. Accordingly, the receiving system is able to determine if the media content was manipulated after being distributed by the content owner.
    Type: Application
    Filed: August 31, 2021
    Publication date: October 12, 2023
    Inventors: Christophe Buffard, Laura Buffard
  • Publication number: 20220094695
    Abstract: Aspects of the present disclosure address systems, methods, and devices for enabling secure communication between electronic control units (ECUs) in a vehicle. The system may include a first and second ECU from a plurality of ECUs in the vehicle. The first ECU is to enable secure communication between the plurality of ECUs by performing operations that include provisioning the second ECU with authentication data for authenticating messages exchanged with a third ECU and provisioning the third ECU with a set of security keys to enable the third ECU to securely exchange messages with the second ECU. The second ECU receives, from the third ECU, a secure message that is cryptographically signed using a security key from the set of security keys provisioned to the third ECU, and the second ECU authenticates the secure message by comparing the authentication data with an authentication signal.
    Type: Application
    Filed: October 13, 2021
    Publication date: March 24, 2022
    Inventors: Christophe Buffard, Sanjeev Sehgal
  • Patent number: 11178158
    Abstract: Aspects of the present disclosure address systems, methods, and devices for enabling secure communication between electronic control units (ECUs) in a vehicle. The system may include a first and second ECU from a plurality of ECUs in the vehicle. The first ECU is to enable secure communication between the plurality of ECUs by performing operations that include provisioning the second ECU with authentication data for authenticating messages exchanged with a third ECU and provisioning the third ECU with a set of security keys to enable the third ECU to securely exchange messages with the second ECU. The second ECU receives, from the third ECU, a secure message that is cryptographically signed using a security key from the set of security keys provisioned to the third ECU, and the second ECU authenticates the secure message by comparing the authentication data with an authentication signal.
    Type: Grant
    Filed: July 5, 2018
    Date of Patent: November 16, 2021
    Assignee: NAGRAVISION S.A.
    Inventors: Christophe Buffard, Sanjeev Sehgal
  • Publication number: 20190238555
    Abstract: Aspects of the present disclosure address systems, methods, and devices for enabling secure communication between electronic control units (ECUs) in a vehicle. The system may include a first and second ECU from a plurality of ECUs in the vehicle. The first ECU is to enable secure communication between the plurality of ECUs by performing operations that include provisioning the second ECU with authentication data for authenticating messages exchanged with a third ECU and provisioning the third ECU with a set of security keys to enable the third ECU to securely exchange messages with the second ECU. The second ECU receives, from the third ECU, a secure message that is cryptographically signed using a security key from the set of security keys provisioned to the third ECU, and the second ECU authenticates the secure message by comparing the authentication data with an authentication signal.
    Type: Application
    Filed: July 5, 2018
    Publication date: August 1, 2019
    Inventors: Christophe Buffard, Sanjeev Sehgal
  • Publication number: 20110213790
    Abstract: A method for notifying a user about a broadcast event comprises the steps of receiving at a management center at least one user keyword; receiving at the management center an identifier of at least one user unit, said at least one user unit being linked to the user; in the management center, determining a set of broadcast data linked to broadcast events; forming a query containing data identifying at least a subset of the set of broadcast data and at least one user keyword; sending said query to a plurality of data sources; receiving at the management center a response to the query, the response indentifying at least one event; transmitting a notification containing an identifier of the at least one present or future event in said response and the identifier of the user unit so that the user unit may notify the user of the events in the response.
    Type: Application
    Filed: March 1, 2011
    Publication date: September 1, 2011
    Applicant: NAGRAVISION S.A.
    Inventors: Laura Fullton, Christophe Buffard