Proposal of secure remote access using encryption

On a remote access environment, strong authentication of the remote user is required since the danger of stealing of authentication devices is very high. In this paper, we propose a secure remote access system appropriate for the remote access environment. Two authentication schemes are used to reduce the danger of stealing of authentication devices. One is the authentication using the public key cryptography. The public key cryptography is stored in the IC card of the remote user and the IC card is locked by the PIN. The another scheme is the one-time pattern authentication which is a sort of challenge and response. Simultaneously, simple key delivery is performed with these authentication protocol. An evaluation of our proposed scheme proves the feasibility and the efficiency as compared with the conventional system using the one-time password and Diffie-Hellman key agreement protocol.