LOG IN SYSTEM

PURPOSE:To prevent the illegal use of a system by recognizing a user by a used ID and a password, temporarily disconnecting a line and connecting again by a telephone number corresponding to the user ID. CONSTITUTION:A log in completing information is fed to a user recognizing means 13 by inputting the user ID and the password through a communication means 15 from a remote terminal 2. Then, the means 13 recognizes whether the inputted user ID is registered in a user registering file 31 or not and if it is registered, whether it coincides with one of the file 31 or not is judged. Then, it is judged that they coincide, a user recognition completing information is fed to a user connecting means 14. When the 14 receives the information from the means 13, it temporarily disconnects the currently line, takes out the telephone number corresponding to the user ID from the file 31 and connects the line again. Thereby, even when the user ID and the password are known by others except the user, the illegal use of the system can be prevented.