Patents by Inventor Jan Leonhard Camnisch

Jan Leonhard Camnisch 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).

  • Non-transferable anonymous credential system with optional anonymity revocation
    Patent number: 7360080
    Abstract: The present invention relates to a method and system for securely proving ownership of pseudonymous or anonymous electronic credentials. A credential system is described consisting of users and organizations. An organization knows a user only by a pseudonym. The pseudonyms of the same user, established for use with different organizations, cannot be linked. An organization can issue a credential to a pseudonym, and the corresponding user can prove possession of this credential to another organization that knows him under another pseudonym. During the prove of possession of the credential nothing besides the fact that he owns such a credential is revealed. A refinement of the credential system provides credentials for unlimited use, so called multiple-show credentials, and credentials for one-time use, so called one-show credentials.
    Type: Grant
    Filed: November 2, 2001
    Date of Patent: April 15, 2008
    Assignee: International Business Machines Corporation
    Inventors: Jan Leonhard Camnisch, Anna Lysyanskaya
  • Non-transferable anonymous credential system with optional anonymity revocation
    Publication number: 20020103999
    Abstract: The present invention relates to a method and system for securely proving ownership of pseudonymous or anonymous electronic credentials. A credential system is described consisting of users and organizations. An organization knows a user only by a pseudonym. The pseudonyms of the same user, established for use with different organizations, cannot be linked. An organization can issue a credential to a pseudonym, and the corresponding user can prove possession of this credential to another organization that knows him under another pseudonym. During the prove of possession of the credential nothing besides the fact that he owns such a credential is revealed. A refinement of the credential system provides credentials for unlimited use, so called multiple-show credentials, and credentials for one-time use, so called one-show credentials.
    Type: Application
    Filed: November 2, 2001
    Publication date: August 1, 2002
    Applicant: International Business Machines Corporation
    Inventors: Jan Leonhard Camnisch, Anna Lysyanskaya