The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 14, 2020
Filed:
Dec. 28, 2016
Intel Corporation, Santa Clara, CA (US);
Santosh Ghosh, Hillsboro, OR (US);
Manoj R Sastry, Portland, OR (US);
Jesse R. Walker, Portland, OR (US);
Ravi L. Sahita, Beaverton, OR (US);
Abhishek Basak, Hillsboro, OR (US);
Vedvyas Shanbhogue, Austin, TX (US);
David M. Durham, Beaverton, OR (US);
Intel Corporation, Santa Clara, CA (US);
Abstract
Embodiments include a computing processor control flow enforcement system including a processor, a block cipher encryption circuit, and an exclusive-OR (XOR) circuit. The control flow enforcement system uses a block cipher encryption to authenticate a return address when returning from a call or interrupt. The block cipher encryption circuit executes a block cipher encryption on a first number including an identifier to produce a first encrypted result and executes a block cipher encryption on a second number including a return address and a stack location pointer to produce a second encrypted result. The XOR circuit performs an XOR operation on the first encrypted result and the second encrypted result to produce a message authentication code tag.