摘要:
IC cards (R11, R12, and R21) are issued respectively to users α, β, and γ. An identification code (ID(11)) of a computer (11) supplied to user α and environment information (ENV(11)) that indicates a normal network environment of the computer (11) are recorded in the IC card (R11) issued to user α. When in order to use a computer, a user connects his/her IC card, the identification code and the network environment of the computer to be used are compared with the identification code and environment information recorded in the IC card and different access rights are provided in accordance to the degree of matching. The identification code may be a MAC address of a LAN circuit incorporated in the computer, and the environment information may be a default gateway address or the like. Different access rights can thus be set according to the computer or the network environment that is used.
摘要:
IC cards (R11, R12, and R21) are issued respectively to users α, β, and γ. An identification code (ID(11)) of a computer (11) supplied to user α and environment information (ENV(11)) that indicates a normal network environment of the computer (11) are recorded in the IC card (R11) issued to user α. When in order to use a computer, a user connects his/her IC card, the identification code and the network environment of the computer to be used are compared with the identification code and environment information recorded in the IC card and different access rights are provided in accordance to the degree of matching. The identification code may be a MAC address of a LAN circuit incorporated in the computer, and the environment information may be a default gateway address or the like. Different access rights can thus be set according to the computer or the network environment that is used.
摘要:
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).
摘要:
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. The signature Sig1 is verified by the B-side processor, and a coincidence is verified between the hash value ID2 and the ID that has been transmitted.
摘要:
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). In this way, a sufficient security can be retained when a plurality of users share a single information processing apparatus.
摘要:
It is possible to issue an IC card storing unique encryption key information in such a manner that re-issuing is enabled and sufficient security can be assured. An IC card provider X delivers an IC card having a group code G(A) to a company A and an IC card having a group code G(B) to a company B. When a company staff α inputs a unique personal code P(α) and performs initialization, in the IC card, calculation is performed according to a predetermined algorithm using the P(α) and G(A). Data uniquely determined by the calculation is stored as encryption key information K(α) in the IC card. Even if the company staff α loses the IC card, it is possible to obtain the IC card having the same encryption key information K(α) as before by performing initialization again by using the IC card delivered by the IC card provider X.
摘要:
It is possible to issue an. IC card storing unique encryption key information in such a manner that re-issuing is enabled and sufficient security can be assured. An IC card provider X delivers an IC card having a group code G(A) to a company A and an IC card having a group code G(B) to a company B. When a company staff α inputs a unique personal code P(α) and performs initialization, in the IC card, calculation is performed according to a predetermined algorithm using the P(α) and G(A). Data uniquely determined by the calculation is stored as encryption key information K(α) in the IC card. Even if the company staff α loses the IC card, it is possible to obtain the IC card having the same encryption key information K(α) as before by performing initialization again by using the IC card delivered by the IC card provider X.
摘要:
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 α and a staff β belonging to the same project group, α 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). β of the reception side writes the variable code V(1) received from α 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.
摘要:
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 α and a staff β belonging to the same project group, α 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). β 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.
摘要:
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). In this way, a sufficient security can be retained when a plurality of users share a single information processing apparatus.