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:
Dec. 02, 2025
Filed:
Jan. 31, 2023
Trustonic Limited, Cambridge, GB;
Lukas Hänel, Valbonne, FR;
Trustonic Limited, Cambridge, GB;
Abstract
A method for protecting a cryptographic operation on a device from a side-channel attack, the device comprising a processor operable to execute a rich execution environment (REE) and a trusted execution environment (TEE), the method comprising: receiving, at the TEE, a request to perform a cryptographic operation, wherein the cryptographic operation is divisible into a plurality of chunks; issuing, by the TEE, a command to control a characteristic of a core of the processor on which the TEE is to be executed on upon subsequent invocation of the TEE; verifying, by the TEE upon subsequent invocation of the TEE, that the characteristic of the core on which the TEE is executing on corresponds to the command; and responsive to a positive verification, performing, by the TEE, the cryptographic operation on one or more chunks of the plurality of chunks.