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.

Abstract: In a computer-assisted learning apparatus for mastering learning contents through simulated experience, a display screen is divided into multiple small screen sections. An explanation text display field, in which explanation text related to predetermined training contents is to be displayed, is assigned to one of the small screen sections, and related-information display fields, in which detailed information and/or illustrated information associated with the contents described in the explanation text display field is to be displayed, are assigned to the remaining small screen sections. A trainee learns based on the explanation text and its related information.

Abstract: In a computer-assisted learning method for certainly mastering the learning contents through simulated experience, a display screen 16a is divided into multiple small screen sections; an explanation text display field, in which explanation text related to predetermined training contents is to be displayed, is assigned to any one of the small screen sections; and related-information display fields, in which detailed information and/or illustrated information associated with the contents described in the explanation text display field is to be displayed, are assigned to the remaining small screen sections. A trainee learns based on the explanation text and its related information.

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.

Abstract: In response to receiving a transmit request REQ1 from a first client apparatus (1), the server (11) transmits a group address INF1 to the first client apparatus (1). The server (11) first transmits the first block X1, which is selected from blocks X1 to X4 that were subdivided from the requested information with the group address, via the network (10). When the server (11) receives a transmit request REQ2 from a second client apparatus (2) after transmitting block X1 to the first client apparatus (1), the server (11) transmits a group address INF2 to the second client apparatus (2). Further, the server (11) transmits the second, third and fourth blocks (X2 to X4) with the group addresses INF1 and INF2 via the network (10). The transmission process is completed after the server (11) has transmitted the first block X1 with the group address INF2 via the network (10).