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:
Feb. 20, 2024
Filed:
Jul. 19, 2021
Nec Laboratories Europe Gmbh, Heidelberg, DE;
Samira Briongos, Heidelberg, DE;
NEC CORPORATION, Tokyo, JP;
Abstract
A method for detecting a microarchitectural attack on a trusted execution environment (TEE) and/or a violation of an expected execution flow of an application running in the TEE includes implementing a counting thread. An eviction set is loaded in a transaction. The eviction set corresponds to a cache set used by an operation of the application such that a transactional abort is received upon the operation being executed. A value of the counting thread is read upon receiving the transactional abort. These steps are repeated for a next operation of the application running in the TEE and an execution time is measured for the operation based on a difference between the values of the counting thread. The measured execution time for the operation is compared with an expected execution time to detect one or more variations that indicate the microarchitectural attack and/or the violation of the expected execution flow.