Cryptography – Communication system using cryptography – Symmetric key cryptography
Reexamination Certificate
2008-01-15
2008-01-15
Sheikh, Ayaz (Department: 2131)
Cryptography
Communication system using cryptography
Symmetric key cryptography
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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Plessier Bernard
Pomet Alain
Sourgen Laurent
Allen Dyer Doppelt Milbrath & Gilchrist, P.A.
Jorgenson Lisa K.
Moorthy Aravind K
Sheikh Ayaz
STMicroelectronics SA
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