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. 18, 1989
Filed:
Nov. 03, 1986
Applicant:
Inventors:
Akihiro Shimizu, Yokosuka, JP;
Shoji Miyaguchi, Yokohama, JP;
Assignee:
Nippon Telegraph and Telephone Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04K / ;
U.S. Cl.
CPC ...
380 29 ; 380 33 ; 380 37 ; 380 46 ; 380 50 ;
Abstract
Input data is split by a splitting part into a plurality of block data having an equal data length to be processed through respective channels. Each channel data is subjected in a function operation part to a function operation in direct or indirect relation to all the other channel data to produce new channel data. Each channel data is subjected in a transform operation part to a transform operation to produce new channel data. All final channel data obtained after function and transform operations are combined by a combining part to obtain randomized data.