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:
Jun. 02, 2026
Filed:
Nov. 21, 2023
Cryptography Research, Inc., San Jose, CA (US);
Winthrop John Wu, Pleasanton, CA (US);
Cryptography Research, Inc., San Jose, CA (US);
Abstract
Technologies for protecting a secure context in a hardware root of trust (ROT) are described. One hardware ROT includes key generation logic and a cryptographic circuit. The key generation logic generates a first key from a value, corresponding to a physical variation of the hardware ROT, and first helper data associated with the physical variation of the hardware ROT. The key generation logic generates a second key from the value and second helper data associated with the physical variation of the hardware ROT. The cryptographic circuit receives a first encrypted secure context from off-chip storage and decrypts the first encrypted secure context using the first key to obtain a secure context. The cryptographic circuit encrypts the secure context using the second key to obtain a second encrypted secure context and stores the second encrypted secure context in the off-chip storage.