Patents by Inventor Lev Yudalevich

Lev Yudalevich 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).

  • Methods and systems for ensuring program code flow integrity
    Patent number: 10642971
    Abstract: In one embodiment a device is described, the device including a memory operative to store an program, a storage operative to store a reference check value for at least one operation in the program, a processor operative to execute the program, including, determining a run-time check value upon execution of the at least one operation in the program, comparing the stored reference check value with the run-time check value, storing the run-time check value as a pre-branch run-time check value prior to entering a conditional branch of the program when the compared stored reference check value and the run-time check value are equal values, resetting the run-time check value of the executing program to the pre-branch run-time check value upon exiting the conditional branch of the program, wherein the reference check value, the run-time check value, and the pre-branch run-time check value are determined as a result of a single function. Related apparatus, methods and systems are also described.
    Type: Grant
    Filed: September 4, 2017
    Date of Patent: May 5, 2020
    Assignee: Cisco Technology, Inc.
    Inventors: David Darmon, Lev Yudalevich, Leonid Frenkel, Yair Arzi, Yigal Dahan, Eyal Wasserman, Yaacov Belenky
  • METHODS AND SYSTEMS FOR ENSURING PROGRAM CODE FLOW INTEGRITY
    Publication number: 20190073472
    Abstract: In one embodiment a device is described, the device including a memory operative to store an program, a storage operative to store a reference check value for at least one operation in the program, a processor operative to execute the program, including, determining a run-time check value upon execution of the at least one operation in the program, comparing the stored reference check value with the run-time check value, storing the run-time check value as a pre-branch run-time check value prior to entering a conditional branch of the program when the compared stored reference check value and the run-time check value are equal values, resetting the run-time check value of the executing program to the pre-branch run-time check value upon exiting the conditional branch of the program, wherein the reference check value, the run-time check value, and the pre-branch run-time check value are determined as a result of a single function. Related apparatus, methods and systems are also described.
    Type: Application
    Filed: September 4, 2017
    Publication date: March 7, 2019
    Inventors: David Darmon, Lev Yudalevich, Leonid Frenkel, Yair Arzi, Yigal Dahan, Eyal Wasserman, Yaacov Belenky