Electronic device with encryption/decryption cells

Cryptography – Communication system using cryptography – Symmetric key cryptography

Reexamination Certificate

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Details

C380S262000, C380S277000, C380S044000, C713S150000, C713S171000, C713S189000, C713S193000, C713S600000, C710S015000

Reexamination Certificate

active

07319758

ABSTRACT:
In an electronic component including a two-way bus through which data elements travel between peripherals and a central processing unit at the rate of a clock signal, the central processing unit and at least one of the peripherals each includes a data encryption/decryption cell. Each data encryption/decryption cell uses the same secret key. The secret key is produced locally at each clock cycle in each cell from a random signal synchronous with the clock signal, and is applied to each of the cells by a one-way transmission line.

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