Microprocessor with on-the-fly switching of decryption keys

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United States of America Patent

PATENT NO 9911008
SERIAL NO

14884547

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Abstract

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A microprocessor is provided in which an encrypted program can replace the decryption keys that are used to decrypt sections of the encrypted program. The microprocessor may be decrypting and executing a first section of the encrypted program when it encounters, decrypts, and executes an encrypted store-key instruction to store a new set of decryption keys. After executing the store-key instruction, the microprocessor decrypts and executes a subsequent section of the encrypted program using the new set of decryption keys. On-the-fly key switching may occur numerous times with successive encrypted store-key instructions and successive sets of encrypted instructions.

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Patent Owner(s)

  • VIA TECHNOLOGIES, INC.

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Bean, Brent Austin, US 41 458
Crispin, Thomas A Austin, US 36 767
Henry, G Glenn Austin, US 410 6629
Parks, Terry Austin, US 256 4788

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