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. 09, 1996
Filed:
Mar. 07, 1995
Kohichi Shibata, Osaka, JP;
Mitsuhiro Nakamura, Osaka, JP;
Mita Industrial Co., Ltd., Osaka, JP;
Abstract
An encryption communication apparatus of the present invention is embodied, for example, by a facsimile machine. A document original of plural pages set on the facsimile machine is read by a scanner section, and converted into image data on a page-by-page basis. A value N1 represents the second of the clock time at which the reading of each page of the document original is completed, and binary-coded data in an N1-th bit position counted from the front bit of each page of image data is inverted. Then, the image data is subjected to a predetermined encryption process, and transmitted in the form of facsimile signals via a communication line. Binary-coded data corresponding to a given pixel in the front portion (left upper portion) of the image data on each page of the document original is inverted. Therefore, even if a third party obtains the encrypted data corresponding to the front portion of the image data, decryption is very difficult and encryption security is ensured.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile