| 摘要 |
PURPOSE: A device and a method for safely realizing link processes by linking with various processing devices on the network are provided to offer a link service by making each server perform each direction while the servers exchange the directions including the direction for each server with each other. CONSTITUTION: To realize the link service requested from a user, a flow controller(204) requests each server(25) or directions inputting device(10) to perform the needed processes by a flow fixed for the link service. An encryption/decryption part(206) encrypts data transmitted to the network(35) from the flow controller, decrypts the received encrypted data, stores a public key of the devices or each user, or obtains the public key from a certification authority on the network. The encryption/decryption part verifies an initiator signature for entire inclusive directions transmitted from the directions inputting device and assigns an electronic signature of the flow controller to the transmitted data. A communication controller(212) performs various controls for communication with other devices. |
