Invention Grant
- Patent Title: Security enhancement in hierarchical protection domains
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Application No.: US16897959Application Date: 2020-06-10
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Publication No.: US11556346B2Publication Date: 2023-01-17
- Inventor: Naresh Kumar Sharma , Saurabh Gorecha , Pravin Kumar
- Applicant: QUALCOMM Incorporated
- Applicant Address: US CA San Diego
- Assignee: QUALCOMM Incorporated
- Current Assignee: QUALCOMM Incorporated
- Current Assignee Address: US CA San Diego
- Agency: The Marbury Law Group
- Main IPC: G06F9/38
- IPC: G06F9/38 ; G06F9/48 ; G06F9/30 ; G06F9/32 ; G06F9/54 ; G06F21/60 ; G06F21/78 ; G06F12/14

Abstract:
Methods and systems for allowing software components that operate at a specific exception level (e.g., EL-3 to EL-1, etc.) to repeatedly or continuously observe or evaluate the integrity of software components operating at a lower exception level (e.g., EL-2 to EL-0) to ensure that the software components have not been corrupted or compromised (e.g., subjected to malware, cyberattacks, etc.) include a computing device that identifies, by a component operating at a higher exception level (“HEL component”), at least one of a current vector base address (VBA), an exception raising instruction (ERI) address, or a control and system register value associated with a component operating at a lower exception level (“LEL component”). The computing device may perform a responsive action in response to determining that the current VBA, the ERT address, or control and system register value do not match the corresponding reference data.
Public/Granted literature
- US20210389953A1 Security Enhancement in Hierarchical Protection Domains Public/Granted day:2021-12-16
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