Patents by Inventor Karl Schimpf

Karl Schimpf 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).

  • Native code module security for arm instruction set architectures
    Patent number: 8856925
    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: September 10, 2013
    Date of Patent: October 7, 2014
    Assignee: Google Inc.
    Inventors: Robert Muth, Karl Schimpf, David C. Sehr, Cliff L. Biffle