Patents by Inventor Joachim Trescher

Joachim Trescher 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).

  • Implementing padding in a white-box implementation
    Patent number: 9665699
    Abstract: A non-transitory machine-readable storage medium encoded with instructions for execution by a keyed encryption operation by a cryptographic system mapping an input message having an encoded portion and a padding portion to an output message, including: instructions for receiving a padding value k; instructions for receiving the input message, wherein the padding portion has a size indicated by the padding value k; instructions for computing a first portion of the encryption operation to produce a first portion output; instructions for computing a compensation factor corresponding to the padding portion of the input message; and instructions for compensating the first portion output based upon the compensation factor.
    Type: Grant
    Filed: March 13, 2015
    Date of Patent: May 30, 2017
    Assignee: NXP B.V.
    Inventors: Wil Michiels, Jan Hoogerbrugge, Joachim Trescher
  • IMPLEMENTING PADDING IN A WHITE-BOX IMPLEMENTATION
    Publication number: 20160267258
    Abstract: A non-transitory machine-readable storage medium encoded with instructions for execution by a keyed encryption operation by a cryptographic system mapping an input message having an encoded portion and a padding portion to an output message, including: instructions for receiving a padding value k; instructions for receiving the input message, wherein the padding portion has a size indicated by the padding value k; instructions for computing a first portion of the encryption operation to produce a first portion output; instructions for computing a compensation factor corresponding to the padding portion of the input message; and instructions for compensating the first portion output based upon the compensation factor.
    Type: Application
    Filed: March 13, 2015
    Publication date: September 15, 2016
    Inventors: Wil Michiels, Jan Hoogerbrugge, Joachim Trescher