Electronic device and method of operating electronic device

An electronic device includes a first non-volatile memory and an application circuit. The first non-volatile memory stores 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 secon...

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Bibliographic Details
Main Author WU, CHIAO
Format Patent
LanguageChinese
English
Published 16.12.2021
Subjects
CALCULATING
COMPUTING
COUNTING
ELECTRIC DIGITAL DATA PROCESSING
PHYSICS
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Summary:An electronic device includes a first non-volatile memory and an application circuit. The first non-volatile memory stores 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 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 encrypted data in the first non-volatile memory with the second encrypted data.
Bibliography:Application Number: TW202110107213