Patents by Inventor Eduarda Freire Stögbuchner

Eduarda Freire Stögbuchner 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: 20180240134
    Abstract: Methods are provided for producing an authenticated packaged product. A digital signature, dependent on unique message data for the product, is generated via a digital signature scheme using a secret signing key. The message data is provided on at least one of the product and packaging. The digital signature is provided on the other of the product and packaging, and the product is packed in the packaging. The digital signature can be generated via a fuzzy-message digital signature scheme having a verification algorithm for verifying the digital signature in relation to fuzzy data within a predetermined difference measure of the message data. Methods and systems for authenticating such packaged products are also provided.
    Type: Application
    Filed: December 30, 2017
    Publication date: August 23, 2018
    Inventors: Jan L. Camenisch, Emmanuel Delamarche, Eduarda Freire-Stögbuchner, Onur Goekce
  • Publication number: 20180240132
    Abstract: Methods are provided for producing an authenticated packaged product. A digital signature, dependent on unique message data for the product, is generated via a digital signature scheme using a secret signing key. The message data is provided on at least one of the product and packaging. The digital signature is provided on the other of the product and packaging, and the product is packed in the packaging. The digital signature can be generated via a fuzzy-message digital signature scheme having a verification algorithm for verifying the digital signature in relation to fuzzy data within a predetermined difference measure of the message data. Methods and systems for authenticating such packaged products are also provided.
    Type: Application
    Filed: February 23, 2017
    Publication date: August 23, 2018
    Inventors: Jan L. Camenisch, Emmanuel Delamarche, Eduarda Freire-Stögbuchner, Onur Goekce
  • Publication number: 20180218166
    Abstract: Data masking is provided by, for at least one predetermined data item in data to be sent, applying a one-way function to that data item to produce a first value, producing a masked data item by encrypting the first value via a deterministic encryption scheme using a current encryption key for a current epoch, and replacing that data item by the masked data item. A data-provider computer sends the masked data to the data-user computer. On expiry of the current epoch, the data-provider computer generates a new encryption key for the encryption scheme in a new epoch, produces mask-update data, dependent on the current and new encryption keys, and sends the mask-update data to the data-user computer. The mask-update data permits updating, at the data-user computer, of masked data items produced with the current encryption key into masked data items produced with the new encryption key.
    Type: Application
    Filed: November 1, 2017
    Publication date: August 2, 2018
    Inventors: Christian Cachin, Jan L. Camenisch, Eduarda Freire Stögbuchner, Anja Lehmann
  • Publication number: 20180218164
    Abstract: Data masking is provided by, for at least one predetermined data item in data to be sent, applying a one-way function to that data item to produce a first value, producing a masked data item by encrypting the first value via a deterministic encryption scheme using a current encryption key for a current epoch, and replacing that data item by the masked data item. A data-provider computer sends the masked data to the data-user computer. On expiry of the current epoch, the data-provider computer generates a new encryption key for the encryption scheme in a new epoch, produces mask-update data, dependent on the current and new encryption keys, and sends the mask-update data to the data-user computer. The mask-update data permits updating, at the data-user computer, of masked data items produced with the current encryption key into masked data items produced with the new encryption key.
    Type: Application
    Filed: January 27, 2017
    Publication date: August 2, 2018
    Inventors: Christian Cachin, Jan L. Camenisch, Eduarda Freire Stögbuchner, Anja Lehmann