Patents by Inventor Andrew James Weiler

Andrew James Weiler 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).

  • Fine-grained stack protection using cryptographic computing
    Patent number: 11580035
    Abstract: A processor includes a register to store an encoded pointer to a variable in stack memory. The encoded pointer includes an encrypted portion and a fixed plaintext portion of a memory address corresponding to the variable. The processor further includes circuitry to, in response to a memory access request for associated with the variable, decrypt the encrypted portion of the encoded pointer to obtain first upper address bits of the memory address and a memory allocation size for a variable, decode the encoded pointer to obtain the memory address, verify the memory address is valid based, at least in part on the memory allocation size, and in response to determining that the memory address is valid, allow the memory access request.
    Type: Grant
    Filed: December 26, 2020
    Date of Patent: February 14, 2023
    Assignee: Intel Corporation
    Inventors: David M. Durham, Karanvir S. Grewal, Michael D. LeMay, Salmin Sultana, Andrew James Weiler
  • CRYPTOGRAPHIC COMPUTING IN MULTITENANT ENVIRONMENTS
    Publication number: 20230027329
    Abstract: A processor, a system, a machine readable medium, and a method.
    Type: Application
    Filed: December 26, 2020
    Publication date: January 26, 2023
    Applicant: Intel Corporation
    Inventors: David M. Durham, Michael D. LeMay, Salmin Sultana, Karanvir S. Grewal, Michael E. Kounavis, Sergej Deutsch, Andrew James Weiler, Abhishek Basak, Dan Baum, Santosh Ghosh
  • ENCODED STACK POINTERS
    Publication number: 20210218547
    Abstract: In one embodiment, an encoded pointer is constructed from a stack pointer that includes offset. The encoded pointer includes the offset value and ciphertext that is based on encrypting a portion of a decorated pointer that includes a maximum offset value. Stack data is encrypted based on the encoded pointer, and the encoded pointer is stored in a stack pointer register of a processor. To access memory, a decoded pointer is constructed based on decrypting the ciphertext of the encoded pointer and the offset value. Encrypted stack data is accessed based on the decoded pointer, and the encrypted stack is decrypted based on the encoded pointer.
    Type: Application
    Filed: March 26, 2021
    Publication date: July 15, 2021
    Applicant: Intel Corporation
    Inventors: Andrew James Weiler, David M. Durham, Michael D. LeMay, Sergej Deutsch, Michael E. Kounavis, Salmin Sultana, Karanvir S. Grewal
  • FINE-GRAINED STACK PROTECTION USING CRYPTOGRAPHIC COMPUTING
    Publication number: 20210149825
    Abstract: A processor includes a register to store an encoded pointer to a variable in stack memory. The encoded pointer includes an encrypted portion and a fixed plaintext portion of a memory address corresponding to the variable. The processor further includes circuitry to, in response to a memory access request for associated with the variable, decrypt the encrypted portion of the encoded pointer to obtain first upper address bits of the memory address and a memory allocation size for a variable, decode the encoded pointer to obtain the memory address, verify the memory address is valid based, at least in part on the memory allocation size, and in response to determining that the memory address is valid, allow the memory access request.
    Type: Application
    Filed: December 26, 2020
    Publication date: May 20, 2021
    Inventors: David M. Durham, Karanvir S. Grewal, Michael D. LeMay, Salmin Sultana, Andrew James Weiler