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:
May. 02, 1989
Filed:
Oct. 10, 1985
Applicant:
Inventor:
Kenji Rikuna, Tokyo, JP;
Assignee:
Casio Computer Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F / ; G06K / ;
U.S. Cl.
CPC ...
235432 ; 235379 ; 235380 ; 235441 ; 380 24 ;
Abstract
An IC card is placed on a card terminal main body, and an internal IC of the IC card is electrically connected to an electrical circuit in a terminal through a connector. Input data entered by a card holder at a keyboard and data read out from the IC card are encrypted in accordance with a predetermined encryption algorithm and are compared with each other. Authenticity of the card terminal and the IC card is determined in accordance with the comparison result.