Patents by Inventor Karl Schmipf

Karl Schmipf 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).

  • Predicated control flow and store instructions for native code module security
    Patent number: 8819399
    Abstract: Some embodiments provide a system that executes a native code module. During operation, the system obtains the native code module. Next, the system loads the native code module into a secure runtime environment. Finally, the system safely executes the native code module in the secure runtime environment by using a set of software fault isolation (SFI) mechanisms that use predicated store instructions and predicated control flow instructions, wherein each predicated instruction from the predicated store instructions and the predicated control flow instructions is executed if a mask condition associated with the predicated instruction is met.
    Type: Grant
    Filed: November 20, 2009
    Date of Patent: August 26, 2014
    Assignee: Google Inc.
    Inventors: Robert Muth, Karl Schmipf, David C. Sehr, Clifford L. Biffle
  • Native Code Module Security for Arm Instruction Set Architectures
    Publication number: 20140013430
    Abstract: Some embodiments provide a system that executes a native code module. During operation, the system obtains the native code module. Next, the system loads the native code module into a secure runtime environment. Finally, the system safely executes the native code module in the secure runtime environment by using a set of software fault isolation (SFI) mechanisms that constrain store instructions in the native code module. The SFI mechanisms also maintain control flow integrity for the native code module by dividing a code region associated with the native code module into equally sized code blocks and data blocks and starting each of the data blocks with an illegal instruction.
    Type: Application
    Filed: September 10, 2013
    Publication date: January 9, 2014
    Applicant: Google Inc.
    Inventors: Robert Muth, Karl Schmipf, David C. Sehr, Cliff L. Biffle
  • Native code module security for arm instruction set architectures
    Patent number: 8561183
    Abstract: Some embodiments provide a system that executes a native code module. During operation, the system obtains the native code module. Next, the system loads the native code module into a secure runtime environment. Finally, the system safely executes the native code module in the secure runtime environment by using a set of software fault isolation (SFI) mechanisms that constrain store instructions in the native code module. The SFI mechanisms also maintain control flow integrity for the native code module by dividing a code region associated with the native code module into equally sized code blocks and data blocks and starting each of the data blocks with an illegal instruction.
    Type: Grant
    Filed: November 18, 2009
    Date of Patent: October 15, 2013
    Assignee: Google Inc.
    Inventors: Robert Muth, Karl Schmipf, David C. Sehr, Clifford L. Biffle
  • NATIVE CODE MODULE SECURITY FOR ARM INSTRUCTION SET ARCHITECTURES
    Publication number: 20110029961
    Abstract: Some embodiments provide a system that executes a native code module. During operation, the system obtains the native code module. Next, the system loads the native code module into a secure runtime environment. Finally, the system safely executes the native code module in the secure runtime environment by using a set of software fault isolation (SFI) mechanisms that constrain store instructions in the native code module. The SFI mechanisms also maintain control flow integrity for the native code module by dividing a code region associated with the native code module into equally sized code blocks and data blocks and starting each of the data blocks with an illegal instruction.
    Type: Application
    Filed: November 18, 2009
    Publication date: February 3, 2011
    Applicant: GOOGLE INC.
    Inventors: Robert Muth, Karl Schmipf, David C. Sehr, Clifford L. Biffle