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:
Feb. 29, 2000
Filed:
Jul. 17, 1997
Applicant:
Inventors:
Carlisle M Adams, Ottawa, CA;
Serge J Mister, Amherstview, CA;
Assignee:
Entrust Technologies, Ltd., Ottawa, CA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04K / ;
U.S. Cl.
CPC ...
380 29 ; 380 37 ; 380 46 ;
Abstract
A method of generating a substitution box (S-box) involves generating an S-box with desired characteristics, forming a new S-box with another column such that the new S-box has the desired characteristics as well, and continuing to add columns in these ways until the S-box has the proper size.