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:
Mar. 07, 2023
Filed:
Aug. 03, 2020
Nuvoton Technology Corporation, Hsin-chu, TW;
Ziv Hershman, Givat Shmuel, IL;
Dan Morav, Herzliya, IL;
NUVOTON TECHNOLOGY CORPORATION, Hsin-Chu, TW;
Abstract
A device including a network interface, a memory and a processor. The network interface is configured to communicate with a verifier over a communication network. The memory is configured to store multiple layers of mutable code, the layers identifiable by respective measurements. The processor is configured to generate, for a given boot cycle, a nonce associated uniquely with the given boot cycle, to receive a challenge from the verifier for attestation of a given layer of the mutable code, to calculate an attestation key based on (i) a Unique Device Secret (UDS) stored securely in the device, (ii) a measurement of the given layer taken by another layer, and (iii) the nonce generated for the given boot cycle, to calculate a response for the challenge, by signing the challenge using the attestation key, and to send the response to the verifier for verification of the given layer.