| 摘要 |
PROBLEM TO BE SOLVED: To prevent a terminal from being illegally used by remote control by making a network terminal and to detect the existence of a virus program to be the cause of the illegal terminal use.SOLUTION: A data communication system provided with input means for performing direct or indirect input on the basis of a user's operation to use a computer connectable to a network, such as the Internet comprises data conversion storage means for converting an operation trajectory of a direct or indirect input of the input means into data and temporarily storing the data, comparison means for comparing the data stored in the data conversion storage means with data to be outputted to the outside, and gate means for disconnecting communication of the data to the outside in the case that the data conversion storage means does not have similar, almost coincident or coincident data in the comparison means. Even if infected with a virus program, an illegal mail is prevented from being transmitted, and the infection of the virus program is detected. |
