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:
May. 23, 2023
Filed:
Aug. 21, 2019
Arm Limited, Cambridge, GB;
Andreas Lars Sandberg, Cambridge, GB;
Matthias Lothar Boettcher, Cambridge, GB;
Prakash S. Ramrakhyani, Austin, TX (US);
Arm Limited, Cambridge, GB;
Abstract
Memory control circuitry controls access to data stored in memory, and memory security circuitry generates encrypted data to be stored in the memory. The encrypted data is based on target data and a first one-time-pad (OTP). In response to an OTP update event indicating that the first OTP is to be updated to a second OTP different from the first OTP, the memory security circuitry generates a re-encryption value based on the first OTP and the second OTP, and the memory security circuitry to issues a re-encryption request to cause updated encrypted data to be generated in a downstream component based on the encrypted data and the re-encryption value and to cause the encrypted data to be replaced in the memory by the updated encrypted data.