The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 22, 1991
Filed:
Sep. 11, 1989
Applicant:
Inventors:
Joseph T Marino, Jr, Fountain Hills, AZ (US);
Ronald S Core, Glendale, AZ (US);
Assignee:
Motorola, Inc., Schaumburg, IL (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04L / ;
U.S. Cl.
CPC ...
380 50 ; 380-4 ; 3642225 ; 3649187 ;
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.