Patents by Inventor Phillippe Teuwen

Phillippe Teuwen 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).

  • Control flow flattening for code obfuscation where the next block calculation needs run-time information
    Patent number: 10599820
    Abstract: A method of obscuring software code including a plurality of basic blocks wherein the basic blocks have an associated identifier (ID), including: determining, by a processor, for a first basic block first predecessor basic blocks, wherein first predecessor basic blocks jump to the first basic block and the first basic block jumps to a next basic block based upon a next basic block ID; producing, by the processor, a mask value based upon the IDs of first predecessor basic blocks, wherein the mask value identifies common bits of the IDs of the first predecessor basic blocks; and inserting, by the processor, an instruction in the first basic block to determine a next basic block ID based upon the mask value and an ID of one of the first predecessor basic blocks.
    Type: Grant
    Filed: April 23, 2014
    Date of Patent: March 24, 2020
    Assignee: NXP B.V.
    Inventors: Jan Hoogerbrugge, Phillippe Teuwen, Wil Michiels
  • CONTROL FLOW FLATTENING FOR CODE OBFUSCATION WHERE THE NEXT BLOCK CALCULATION NEEDS RUN-TIME INFORMATION
    Publication number: 20150310193
    Abstract: A method of obscuring software code including a plurality of basic blocks wherein the basic blocks have an associated identifier (ID), including: determining, by a processor, for a first basic block first predecessor basic blocks, wherein first predecessor basic blocks jump to the first basic block and the first basic block jumps to a next basic block based upon a next basic block ID; producing, by the processor, a mask value based upon the IDs of first predecessor basic blocks, wherein the mask value identifies common bits of the IDs of the first predecessor basic blocks; and inserting, by the processor, an instruction in the first basic block to determine a next basic block ID based upon the mask value and an ID of one of the first predecessor basic blocks.
    Type: Application
    Filed: April 23, 2014
    Publication date: October 29, 2015
    Applicant: NXP B.V.
    Inventors: Jan Hoogerbrugge, Phillippe Teuwen, Wil Michiels