Power analysis attack protection

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 12126709
APP PUB NO 20230037804A1
SERIAL NO

17670463

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Abstract

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In one embodiment, a processing device includes a symmetric block cipher configured to encrypt plaintext blocks yielding respective ciphertext blocks, obfuscation circuitry configured to obfuscate the respective ciphertext blocks responsively to an obfuscation secret yielding respective obfuscated ciphertext blocks and an interface to send the respective obfuscated ciphertext blocks to at least one remote processing device. In one embodiment, the processing device provides side-channel attack protection within a symmetric key scheme by data obfuscation and by changing encryption/decryption keys using key manipulation so that different blocks or group of blocks of data are encrypted/decrypted using respective encryption/decryption keys.

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Patent Owner(s)

Patent OwnerAddress
NUVOTON TECHNOLOGY CORPORATIONNO 4 CREATION RD III HSINCHU SCIENCE PARK

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Alon, Moshe Tel-Aviv, IL 34 279
Hershman, Ziv Givat Shmuel, IL 51 370

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