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:
Nov. 15, 2022
Filed:
Nov. 25, 2020
Pufsecurity Corporation, Hsinchu County, TW;
Chia-Cho Wu, Hsinchu County, TW;
PUFsecurity Corporation, Hsinchu County, TW;
Abstract
An electronic device includes a first non-volatile memory and an application circuit. The first non-volatile memory stores first encrypted data encrypted with a global key. The application circuit includes a second non-volatile memory, a decryption unit, a local key unit, and an encryption unit. The second non-volatile memory stores the global key. The decryption unit is coupled to the first non-volatile memory and the second non-volatile memory. The decryption unit retrieves the global key from the second non-volatile memory and decrypts the first encrypted data with the global key to generate plain data. The local key unit generates or stores a local key. The encryption unit is coupled to the local key unit. The encryption unit encrypts the plain data with the local key to generate second encrypted data and overwrites the first encrypted data in the first non-volatile memory with the second encrypted data.