| 摘要 |
PURPOSE:To improve to hold the secrecy by changing hourly the password, and renewing freely a data converting table in the storing media of a host computer only by a terminal user. CONSTITUTION:To password data, time data messages are added and the password is converted by the converting character data corresponding to the time data for at least one hour. In this case, a means to renew freely the renewal of the converting character data stored in the data base of a host computer 2 by a terminal 3 side user is provided. Then, the decoding for the password is not fixed as conventionally, but changed as the time passes, and the user of the terminal 3 can re-write the converting character used as the time passes. Thus, the secrecy of the information for the unfair user can be held. |
