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:
Jan. 11, 2000
Filed:
Apr. 03, 1997
Applicant:
Inventors:
Shigeaki Nakamura, Osaka, JP;
Tetsuya Nishino, Osaka, JP;
Yoshio Morita, Osaka, JP;
Masahiro Inoue, Osaka, JP;
Masaru Sato, Osaka, JP;
Hiroshi Sakai, Osaka, JP;
Yukihiro Oi, Osaka, JP;
Yoshio Shirai, Osaka, JP;
Assignee:
Mita Industrial Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04K / ; H04N / ;
U.S. Cl.
CPC ...
380-9 ; 380 18 ;
Abstract
An apparatus for encrypted communication in which transmission data is encrypted based upon a cipher key and is transmitted. The received encrypted data is decrypted based upon a cipher key. A cipher key checker checks for agreement of the cipher keys by decoding the decrypted received data. The cipher key checker decodes the decrypted data in a unit of a preselected number of lines and determines whether the data are properly decoded or not.