| 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 (11) ; a plurality of blades (14) ; and a management server (12) that manages the blades (14), in which: the management server (12) selects a blade (14), authenticates the terminal device (11) and the selected blade (14), and mediates encrypted communication path establishment between the terminal device (11) and the selected blade (14) ; the terminal device (11) and the blade (14) perform encrypted communication without the mediation of the management server (12) ; and the management server (12) requests a validation server (13) to authenticate each terminal.
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