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:
Aug. 16, 2022
Filed:
Jun. 29, 2020
Nuvoton Technology Corporation, Hsin-chu, TW;
Oren Tanami, Ra'anana, IL;
Ziv Hershman, Givat Shmuel, IL;
NUVOTON TECHNOLOGY CORPORATION, Hsin-Chu, TW;
Abstract
In one embodiment, a secure chip apparatus, includes a memory to store an encrypted value E and a one-way function output-value H, which is an output value of a one-way function computed with a nonce N as input, an interface to transfer data with an external device, and chip security circuitry to lock a portion of the chip apparatus from use, receive an unlock request from an unlocking hardware security module (HSM) via the interface, provide the encrypted value E to the HSM responsively to the unlock request, receive a value N' from the HSM, the value N′ being a decrypted value of the encrypted value E, compute a one-way function output-value H′ responsively to the value N′, compare the value H′ to the value H, and unlock the portion of the chip apparatus for use responsively to a match between the value H′ and the value H.