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:
Jul. 02, 1996
Filed:
Mar. 18, 1994
Applicant:
Inventor:
Willis J Luther, Irvine, CA (US);
Assignee:
Canon Information Systems, Inc., Costa Mesa, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04L / ; H04L / ;
U.S. Cl.
CPC ...
380 28 ; 380-9 ; 380 10 ; 380 14 ; 380 49 ;
Abstract
A system for encrypting two-dimensional data such as image data, or data like multi-media data which can be transformed into two-dimensional data. The data is encrypted by multiple encryption passes through the data. In each pass, each mth row and each nth column of data is encrypted by complementation of the data in the row or column. For each encryption pass, m and n are randomly selected. The encryption system converts non-two-dimensional data to a pseudo-two-dimensional format by computing the square root of the binary length of the non-two-dimensional data file.