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:
Sep. 28, 1993
Filed:
Jun. 12, 1992
Applicant:
Inventors:
Norbert Erbes, Karlsruhe, DE;
Dietrich Rother, Tamm, DE;
Rainer Vogel, Walzbachtal, DE;
Christoph Prasse, Illingen, DE;
Assignee:
Alcatel N.V., Amsterdam, NL;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04L / ;
U.S. Cl.
CPC ...
380 49 ; 380-4 ; 380-9 ; 380 50 ;
Abstract
A data-processing system includes an address bus and a data bus operatively coupled to a central processing unit, main memories, and control circuits for peripheral equipment, information carried on the data bus being encrypted. An encryption and decryption device is operatively coupled between the data bus and the central processing unit, for encrypting and decrypting the information.