Patents by Inventor Kai Wilhelm Samelin

Kai Wilhelm Samelin 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).

  • Securing mobile device by RAM-encryption
    Patent number: 11646870
    Abstract: A computer-implemented method for protecting a mobile device against unauthorized access may be provided. The method comprises encrypting the user data stored in a volatile memory of the mobile device if the mobile device is switched to a locked status, and decrypting the user data stored in the volatile memory if the mobile device is switched from the locked status into an unlocked status.
    Type: Grant
    Filed: January 23, 2019
    Date of Patent: May 9, 2023
    Assignee: International Business Machines Corporation
    Inventors: Cecilia Boschini, Jan L. Camenisch, Tommaso Gagliardoni, Kai Wilhelm Samelin
  • Method for leakage-resilient distributed function evaluation with CPU-enclaves
    Patent number: 10826694
    Abstract: The present disclosure relates to a method for using a secret key for cryptographically processing a data item in an enclave enabled system. The method comprises: computing a first set of shares of the secret key and storing them in an encrypted format. Each encrypted share may be sent to respective component in a first set of components. In response to sending the encrypted shares, a modified encryption of the respective share may be received from each of the first set of components. Each of the received modified encryptions may be encrypted and the resulting modified share is sent to the respective first set of components. In response to sending the decrypted modified shares, a data item cryptographically processed using the respective share may be received from each of the first set of components. The received data items may be combined to obtain a cryptographically processed data item.
    Type: Grant
    Filed: April 23, 2018
    Date of Patent: November 3, 2020
    Assignee: International Business Machines Corporation
    Inventors: Jan L. Camenisch, Manu Drijvers, Anja Lehmann, Kai Wilhelm Samelin
  • SECURING MOBILE DEVICE BY RAM-ENCRYPTION
    Publication number: 20200235919
    Abstract: A computer-implemented method for protecting a mobile device against unauthorized access may be provided. The method comprises encrypting the user data stored in a volatile memory of the mobile device if the mobile device is switched to a locked status, and decrypting the user data stored in the volatile memory if the mobile device is switched from the locked status into an unlocked status.
    Type: Application
    Filed: January 23, 2019
    Publication date: July 23, 2020
    Inventors: Cecilia Boschini, Jan L. Camenisch, Tommaso Gagliardoni, Kai Wilhelm Samelin
  • Method for Leakage-Resilient Distributed Function Evaluation with CPU-Enclaves
    Publication number: 20190327088
    Abstract: The present disclosure relates to a method for using a secret key for cryptographically processing a data item in an enclave enabled system. The method comprises: computing a first set of shares of the secret key and storing them in an encrypted format. Each encrypted share may be sent to respective component in a first set of components. In response to sending the encrypted shares, a modified encryption of the respective share may be received from each of the first set of components. Each of the received modified encryptions may be encrypted and the resulting modified share is sent to the respective first set of components. In response to sending the decrypted modified shares, a data item cryptographically processed using the respective share may be received from each of the first set of components. The received data items may be combined to obtain a cryptographically processed data item.
    Type: Application
    Filed: April 23, 2018
    Publication date: October 24, 2019
    Inventors: Jan L. Camenisch, Manu Drijvers, Anja Lehmann, Kai Wilhelm Samelin