摘要:
A validation authority for certificates searches for and verifies paths and certificate revocation lists periodically, and classifies the paths into valid paths and invalid paths in accordance with the results of the validations, so as to register the paths in databases beforehand. Besides, in a case where a request for authenticating the validity of a certificate has been received from an end entity, the validation authority judges the validity of the public key certificate by checking in which of the valid-path database and the invalid-path database a path corresponding to the request is registered. On the other hand, in a case where the path corresponding to the validity authentication request is not registered in either of the databases, the validity of the public key certificate is authenticated by performing path search and validation anew.
摘要:
An access authorization system is provided, which can reduce the user wait time until the provision of a user-requested service. The access authorization system of the present invention specifies the next service to be provided to a UT (a client-side communication device) after the service currently being provided to the UT, and then executes process to make an authorization decision in advance regarding the next service with respect to the user of the UT, before the UT requests the next service.
摘要:
A method and a system for speeding up session establishment are provided, wherein the time required to establish a session is reduced, even in the case where a session management server requires a large amount of time to process respective functions required for establishing the session (such as making a decision regarding whether to permit or deny provision of a service, or generating a session key).The session management server is provided with means for conducting, in parallel, processing to issue processing requests for respective functions required for establishing a session (such as making a decision regarding whether to permit or deny provision of a service, or generating a session key) and processing to forward a communication message transmitted by a communications device or another session management server attempting to establish a session.
摘要:
To minimize risk of printing-out to a printer located at an improper base, where a network is established between the bases, terminal devices, a server, printers, and a management device which manages printers are provided. The management device manages position information of the printers installed in bases. Every time printing is requested, the management device extracts printer candidates located close to a terminal device and asks a user of the terminal device to select one of the printer candidates. The user visually confirms the installation locations of the extracted printer candidates included in a list and selects an appropriate printer for each printing. Accordingly, risk of erroneously printing using a printer installed in an improper base can be reduced.
摘要:
To solve problems in that a load on a VPN device is large in a case where the number of terminal devices increases in encrypted communication using a VPN technique, and that only communication between the terminal device and the VPN device is encrypted, thus disabling end-to-end encrypted communication, a communication system is provided, including: a terminal device; a plurality of blades; and a management server that manages the blades, in which: the management server selects a blade, authenticates the terminal device and the selected blade, and mediates encrypted communication path establishment between the terminal device and the selected blade; the terminal device and the blade perform encrypted communication without the mediation of the management server; and the management server requests a validation server to authenticate each terminal.
摘要:
An encrypted communication method, and a system for the method, can transfer a session control message designated by identification information inherent to an application to a connection destination through a session management server. When an application program of a client or encrypted communication software issues a connection request in the form designating an application server by identification information inherent to each application, the identification information is automatically changed to a desired address-of-record capable of domain identification and a transfer destination domain of a reception message is judged.
摘要:
An encrypted communication system is provided, in which an encryption key for use in encrypted communication and settings information for the encrypted communication are distributed to each of a plurality of communication devices performing encrypted communication within a group, and in which traffic generated by distributing the encryption key and the like can be reduced. In the encrypted communication system according to the present invention, information including a key for use in the intra-group encrypted communication or a seed which generates the key is distributed to the communication devices belonging to the group that are participating (e.g., logged in) in the intra-group encrypted communication.
摘要:
When a cryptographic communicating part 208 of the communication support server 20 exchanges information with the information processing units 14, if the term of validity of a first key stored in a cryptographic key storing part 200 and corresponding to the identification information of the information processing unit 14 does not expire, the cryptographic communicating part 208 performs the cryptographic communication with the information processing unit 14 using the first key, without performing a process of authenticating the information processing units 14. When the term of validity of the first key expires or the first key corresponding to the identification information of the information processing units 14 is not stored, the key sharing part 202 shares the first key with the information processing units 14, and the cryptographic communicating part 208 performs the cryptographic communication with the information processing units 14 using a newly shared first key.
摘要:
A server device that represents a plurality of service provision servers implements authentication and a SIP message exchange with respect to a SIP server as a representative, and notifies a service provision server of client communication information that is acquired by the SIP message exchange. The service provision server communicates with a client on the basis of the client communication information that is notified from the representative server.
摘要:
In inter-peer communication between an application server for providing service such as Voice over IP or contents distribution and a client using the service, the client or the application server notifies a log management server of a communication log by a log information process. The log management server verifies consistency of the notified communication log by a log compare process requested by the client or the application server. Because the log information process and the log compare process are executed periodically during inter-peer communication, the client and the application server can detect inconsistency of the communication log instantaneously and notify each other of the consistency of the communication log.