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:
Sep. 08, 2026
Filed:
Mar. 16, 2023
Arm Limited, Cambridge, GB;
Jason Parker, Sheffield, GB;
Yuval Elad, Cambridge, GB;
Alexander Donald Charles Chadwick, Cambridge, GB;
Arm Limited, Cambridge, GB;
Abstract
There is provided an apparatus that includes processing circuitry for performing processing in one of a fixed number of at least two domains. One of those domains is subdivided into a variable number of execution environments and memory protection circuitry uses a key input to perform encryption or decryption on the data of a memory access request issued to a memory address from within a current one of the domains. The key input is different for each of the domains and for each of the execution environments, the key input for each of the domains is fixed at boot time of the apparatus, and the key input for each of the execution environments is dynamic.