| 摘要 |
A VPN management server transmits a seed to a client computer and VPN server. The client computer generates a VPN password from the seed using a prescribed algorithm and transmits the generated VPN password to the VPN server. The VPN server generates a password from the seed using an algorithm identical with the prescribed algorithm in the client computer. If the VPN password transmitted from the client computer and the VPN password generated in the VPN server match, the VPN server allows utilization of the VPN by reason of the fact that the client computer has been authenticated. Even if leakage of the seed occurs, the VPN password will not be generated unless the algorithm is analyzed. The result is enhanced security.
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