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.

Date of Patent:
Sep. 26, 2006

Filed:

Aug. 29, 2002
Applicants:

Kiyoshi Watanabe, Tokyo, JP;

Kouzo Iwami, Tokyo, JP;

Masayuki Miura, Tokyo, JP;

Inventors:

Kiyoshi Watanabe, Tokyo, JP;

Kouzo Iwami, Tokyo, JP;

Masayuki Miura, Tokyo, JP;

Assignee:

Graphin Co., Ltd., Tokyo, JP;

Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F 11/30 (2006.01); H04L 9/32 (2006.01); G06F 15/16 (2006.01); G06F 15/173 (2006.01);
U.S. Cl.
CPC ...
Abstract

A leakage preventing system of confidential information, for example, for CBT (Computer Based Training), prevents leakage of highly confidential education and training information. The system includes a manager terminal unit having an authentication server, an educator/trainer terminal unit for holding confidential information for CBT in the encrypted form and operated by a specific user, and a communication network for exchanging from time to time data between these terminal units. Authentication is given to the educator/trainer terminal unit only when an authentication request from the educator/trainer terminal unit satisfies predetermined authentication granting requirements, and a prescribed limited using time is set so as to make it possible to peruse the confidential information decoded in the educator/trainer terminal unit, only within the limited time.


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