Microcomputer

Details Microcomputer Microcomputer

1991-09-06

1992-10-06

Cangialosi, Salvatore

Cryptography

Key management

Having particular key generator

380 4, H04K 100

Patent

active

051539217

ABSTRACT:
A microcomputer according to this invention which incorporates a bus switching circuit disposed between the ALU unit and memory unit, and the input/output unit, which carries out switching of the order of bit string and encryption of data and programs based on instructions from the ALU unit 2 or data or programs from the memory units 5 and 7. Encrypted data or programs are output to the outside of the microcomputer via the input/output unit 6, while the said encrypted data or programs that are input from the outside of the microcomputer are decoded and sent to the ALU unit 2 or the memory units 5 and 7.

REFERENCES:
patent: 4823308 (1989-04-01), Knight
patent: 4905277 (1990-02-01), Nakamura
patent: 5007082 (1991-04-01), Cummins

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