Abstract: An agent program (12) installed in a terminal device (10) is used to upload data, which are to be stored, to a data storage device (100) via a first network (N1). Data uploaded to a first data storage unit (110) are stored therein as they are. On the other hand, data uploaded to a second data storage unit (120) are transferred, by the function of a data transferring unit (130), to any of external storage sites (210-230) via a second network (N2), and management information, which includes the URL of the storage site that is the transfer destination, is stored into an IC card (11). When the data stored in the data storage unit (120) are required, the management information in the IC card (11) is given to the data transferring unit (130) and the relevant data are forwarded from the storage site that was the transfer destination to the data storage unit (120) and then downloaded to the terminal device (10). The limit of the storage capacity can thereby be overcome and damages due to viruses can be suppressed.

Abstract: Personal computers and other electronic devices that are connected by a network are installed in each individual office. An employee is enabled to use each individual electronic device by performing an authentication process using authentication information in an information recording medium (IC card) that is issued as an employee ID card. In the information recording medium is recorded a code C103 that indicates an electronic device that is to be a report target (for example, the employee's own personal computer 103 installed in a Chiba Branch).

Abstract: It is possible to perform encrypted communication between members of a group while assuring a sufficient security compatible with a change of the members. An IC card having the same fixed code F(a) is distributed to all the staffs of company A. When communication is performed between a staff ? and a staff ? belonging to the same project group, ? of the transmission side writes an arbitrary variable code V(1) in the IC card (100a) so as to generate encryption key information K(a1) according to F(a) and V(1) in the IC card and encrypt data D1 by using K(a1). ? of the reception side writes the variable code V(1) received from a in the IC card (100b) so as to generate encryption key information K(a1). By using this K(a1), the encrypted data D2 received is decrypted to obtain data D3. The fixed code F(a) is different for each of the companies and rewrite-disabled so as to assure security.

Abstract: When a user, who has logged onto an information processing apparatus (100), executes a logoff procedure, a saving unit (160) executes the following processes. Firstly, from among the files residing in a data storage unit (110), any files that are recognized as requiring a security protection and hence are to be saved are copied into an external storage device (300) via a network (200), and the original files in the data storage unit (110) are then deleted. At this moment, the address of the copy destination is stored, as management information, into a portable information recording medium (400) possessed by the user. When the user logs onto the information processing apparatus (100) again, a restoring unit (170) restores, based on the management information stored in the portable information recording medium (400), the files saved in the external storage device (300) into the data storage unit (110).

Abstract: When storing data (D1), spread on a memory (10), into a file storage unit (50), a user ? assigns a meaningful filename-for-user, such as “sales book for April.” Storage control unit (35) converts this “sales book for April” to a meaningless filename-for-storage, such as “RST123.” The correspondence between the two is stored as filename correspondence information for user ? in a correspondence information storage unit (80). A storage processing unit (30) stores the data (D1) with the filename, “RST123.” Whereas when user ? is presented with a list of filenames of the stored files from a filename presentation unit (60), the meaningful filename of “sales book for April” is presented as the filename since a presentation control unit (65) performs reverse conversion of the filename based on the filename correspondence information, the meaningless filename of “RST123” is presented to other users. Security in regard to filenames can thus be secured and inference of the file contents can be prevented.

Abstract: There are provided an output information management system and a method therefor that prevent an output device, which outputs information onto media from being used by an unauthorized third party and allow efficient investigation of an unauthorized activity by an authorized user. A server which constitutes the output information management system stores ID information stored on an IC card for a user and information to be outputted by the output device in an output information database in association with each other. Thus, in case that an unauthorized output is performed, specific evidence as to who outputted what information on the output device is preserved. Therefore, an unauthorized output can be deterred and, if by any chance an unauthorized activity is committed, the activity can be efficiently identified.

Abstract: The present invention provides an information processing device, an information processing system, and a program capable of improving security while maintaining convenience to the user. An information processing device 10 includes a magnetic disk 19 which stores application control information including identification information on a file in which an executable application program is stored, such as a file name and a path, and specific information on the file such as a CRC code, and a decision section 111 which decides, when a start request for an application program has been issued, whether or not to permit start of the application program designated by the start request based on the application control information.

Abstract: In order to give sufficient evidential admissibility to the content of a contract made online, contractual terms data C that shows a character string of contractual terms is prepared and stored by a processor on the side of a transacting party A. The data C is then transmitted to a processor on the side of a transacting party B, and is stored. A hash value ID2 of the contractual terms data C is calculated by the B-side processor, and a signature Sig2 of the party B is added and transmitted to the A-side processor as formal contractual proposal information. The signature Sig2 is verified by the A-side processor. A coincidence is verified between a hash value ID1 of the data C and the ID2 that has been transmitted. A signature Sig1 of the party A is added to a coinciding hash value ID, and is transmitted to the B-side processor as formal contractual acceptance information.

Abstract: A distributed data archive device (1) is placed on an arbitrary location on a network (3) so that data can be saved and extracted. During data saving, a to-be-saved data file (F1) is given to the archive device (1), and a division/encryption means (13) carries out division/encryption, and individual divided files are distributed and saved onto data servers (2a, 2b, 2c) by a network communication means (16). A data management means (15) forms management data that shows a division/encryption method and a depository-destination data server, and records it onto a portable recording medium (10) during the data saving. During data extraction, the portable recording medium (10) is connected to an arbitrary archive device (1), and the management data is read. Based on this management data, the divided files are extracted from the depository destinations, and are reconstituted into the original data file (F1) by a decryption/integration means (14).

Abstract: A distributed data archive device (1) is placed on an arbitrary location on a network (3) so that data can be saved and extracted. During data saving, a to-be-saved data file (F1) is given to the archive device (1), and a division/encryption means (13) carries out division/encryption, and individual divided files are distributed and saved onto data servers (2a, 2b, 2c) by a network communication means (16). A data management means (15) forms management data that shows a division/encryption method and a depository-destination data server, and records it onto a portable recording medium (10) during the data saving. During data extraction, the portable recording medium (10) is connected to an arbitrary archive device (1), and the management data is read. Based on this management data, the divided files are extracted from the depository destinations, and are reconstituted into the original data file (F1) by a decryption/integration means (14).

Abstract: An optical repeater for realizing transmission of supervisory information of an optical fiber transmission system without the output power of an optical fiber amplifier being reduced, wherein a supervisory optical transmitter and optical receiver with a wavelength which is similar to the wavelength of the pumping light source of the optical fiber amplifier are mounted, and on the input side of the optical repeater, pumping light is multiplexed in the forward direction and a supervisory optical signal, which is multiplexed in wavelength and transmitted, is demultiplexed simultaneously by the first wavelength multi- and demultiplexer and they are received by the supervisory optical receiver, and on the output side of the optical repeater, pumping light is muitiplexed in the reverse direction and a supervisory optical signal outputted from the supervisory optical transmitter is multiplexed by the second wavelength multi- and demultiplexer.

Abstract: The matter of concern is the reflection of a radio wave such as a television broadcast wave from a laminated panel having a substrate low in reflectance for radio waves and a layer relatively high in reflectance for radio waves. The reflection is greatly reduced by dividing the reflective layer into a plurality of discontinuous segments by a series of relatively narrow slits such that the width of each segment in the direction parallel to the direction of the electric field of the radio wave is not greater than 1/3 of the wavelength of the radio wave. The invention is suitable for application to a heat reflecting glass with a heat reflecting film having a surface resistivity below about 500 .OMEGA./.quadrature., and in that case it is preferable that the width of each segment of the heat reflecting film is not greater than 1/20 of the wavelength.