Patents by Inventor Théophane Lumineau

Théophane Lumineau 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).

  • Method and device for creating a group signature and related method and device for verifying a group signature
    Patent number: 8661251
    Abstract: A method for creating a group signature of a message to be implemented by a member of a group in a system, the system including a trust authority, the group including at least the member provided with a secure portable electronic entity including storage elements and computing elements wherein are implanted a cryptographic algorithm. The method includes the following steps: generating via the computing elements a signature of the message using a private key common to the members of the group and integrating a data identifying the group member and a temporal data representing a temporal information of the member's membership to the group and of the date of the signature of the message, the private key common to the members of the group, the identifying data and the temporal data being stored in the storage elements.
    Type: Grant
    Filed: October 12, 2006
    Date of Patent: February 25, 2014
    Assignee: Oberthur Technologies
    Inventors: Emmanuel Prouff, Jean-Bernard Fischer, Théophane Lumineau
  • Method and Device for Creating a Group Signature and Related Method and Device for Verifying a Group Signature
    Publication number: 20080244276
    Abstract: A method for creating a group signature of a message to be implemented by a member of a group in a system, the system including a trust authority, the group including at least the member provided with a secure portable electronic entity including storage elements and computing elements wherein are implanted a cryptographic algorithm. The method includes the following steps: generating via the computing elements a signature of the message using a private key common to the members of the group and integrating a data identifying the group member and a temporal data representing a temporal information of the member's membership to the group and of the date of the signature of the message, the private key common to the members of the group, the identifying data and the temporal data being stored in the storage elements.
    Type: Application
    Filed: October 12, 2006
    Publication date: October 2, 2008
    Applicant: Oberthur Card Systems SA
    Inventors: Emmanuel Prouff, Jean-Bernard Fischer, Theophane Lumineau