Secure cryptographic processor arrangement

Details Secure cryptographic processor arrangement Secure cryptographic processor arrangement

1989-09-11

1991-01-22

Moskowitz, Nelson

Cryptography

Electric signal modification

Having production of printed copy

380 4, 3642225, 3649187, H04L 902

Patent

active

049875957

ABSTRACT:
A secure processor arrangement for a communications secure kernel of a secure processor system. This processor arrangement provides protection of plain text data and suitable isolation of data necessary to support single processor architecture. A red memory subsystem stores plain text data and a black memory subsystem stores cypher text data. In order to prevent mishandling of plain text data, the single processor is allowed to directly read and to write red memory, but the single processor is only permitted to directly read from the black memory.

REFERENCES:
patent: 4278837 (1981-07-01), Best
patent: 4352952 (1982-10-01), Boone et al.
patent: 4646234 (1987-02-01), Tolman et al.
patent: 4670857 (1987-06-01), Rackman
patent: 4847902 (1989-07-01), Hampson

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