Outside leakage preventing system of confidential information

• US 20030065937A1
• Filed: 08/29/2002
• Published: 04/03/2003
• Est. Priority Date: 10/03/2001
• Status: Active Grant

• Current Assignee: GRAPHIN CO., LTD. (TECHNO HORIZON Co., Ltd.)
• Original Assignee: GRAPHIN CO., LTD. (TECHNO HORIZON Co., Ltd.)
• Inventors: Watanabe, Kiyoshi, Miura, Masayuki, Iwami, Kouzo
• Granted Patent: US 7,114,081 B2
• Time in Patent Office: Days
• US Class Current: 713/200
• CPC Class Codes: G06F 21/6209 to a single file or object, e.g. in a secure envelope, encrypted and accessed using a key, or with access control rules appended to the object itself
• CPC Class Codes: G06F 2221/2137 Time limited access, e.g. to a computer or data
• CPC Class Codes: G09B 5/00 Electrically-operated educational appliances working with questions and answers G09B7/00; simulators G09B9/00; advertising or displaying in general G09F
• CPC Class Codes: G09B 7/00 Electrically-operated teaching apparatus or devices working with questions and answers mechanically operated G09B3/00; computing arrangements G06F

Abstract

The present invention relates to a leakage preventing system of confidential information, for example, for CBT (Computer Based Training) which prevents leakage through takeout of highly confidential education and training information. The system of the invention comprises a manager terminal unit having an authentication server, an educator/trainer terminal unit holding confidential information for CBT in the encrypted form and operated by a specific user, and a communication network connecting from time to time exchange of data between these terminal units, wherein 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 perusal 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 perusal time.

Claims

1. A user terminal unit connected to a host computer via a prescribed communication network, wherein:

on condition that there is available an encrypted data file storing confidential encrypted by encrypting means, and that authentication is given by said host computer as satisfying predetermined authenticating requirements, it is made possible to peruse said confidential information in said encrypted data file by means of a prescribed browser through decoding within a prescribed limited perusal period set by said host computer.

2. An educator/trainer terminal unit connected to a manager terminal unit via a prescribed communication network, wherein:

on condition that there is available an encrypted data file storing computer based confidential information for education and training encrypted by encrypting means, and that authentication is given by said manager terminal unit as satisfying predetermined authenticating requirements, it is made possible to peruse said confidential information in said encrypted data file by means of a prescribed browser through decoding within a prescribed limited perusal period set by said manager terminal unit.

3. A leakage preventing system preventing leakage to outside of computer based confidential information for education and training, comprising:

a manager terminal unit having an authentication server under control of a manager;

an educator/trainer terminal unit, having an encrypted data file which stores computer based confidential information for education and training encrypted by encrypting means, operated by a specific user registered in said manager terminal unit; and

a communication network mutually connecting said individual terminal units from time to time for transmission and receiving of data;

wherein;

said manager terminal unit gives authentication to said educator/trainer terminal unit and sets a limited perusal time for limiting the perusal time by said user thereto; and

wherein;

said educator/trainer terminal unit on condition of authentication by said manager terminal unit, decodes said confidential information in said encrypted data file and makes it possible to peruse said confidential data by a prescribed browser only during said limited perusal time.

4. A leakage preventing system preventing leakage to outside of computer based confidential information for education and training according to claim 3, wherein:

said limited perusal time set by said manager terminal unit in said educator/trainer terminal unit is within the lapse of a prescribed time relative to the date and time of startup of said browser and/or within a prescribed non-operating time after the startup of said browser.

5. A method for preventing leakage to outside of computer based confidential information encrypted by encrypting means, comprising:

a step of installing said confidential information in an encrypted data file of an educator/trainer terminal unit used by a specific user;

a step of user'"'"'s sending an authentication request from said educator/trainer terminal unit via a prescribed communication network to a manager terminal unit managed by a manager;

a step of granting authentication to said educator/trainer terminal unit, and setting a limited perusal time for limiting the perusal time of said user; and

a step of making it possible to peruse said information by a prescribed browser only within said limited perusal time by decoding said confidential information in said encrypted data file on said educator/trainer terminal unit side.

6. A method for preventing leakage to outside of computer based confidential information for education and training according to claim 5, wherein:

said limited perusal time set by said manager terminal unit in said educator/trainer terminal unit is within the lapse of a prescribed time relative to the date and time of startup of said browser and/or within a prescribed non-operating time after the startup of said browser.