| 摘要 |
<P>PROBLEM TO BE SOLVED: To reduce damage caused by spoofing on a network. <P>SOLUTION: The communication system includes a host server (10) and at least one client terminal (20) mutually connected to each other via a communication line (1), where the client terminal receives services from the host server. The communication system extracts data regarding an access start date embedded in mixed text data transmitted from the client terminal, converts it to a directly readable access start date, compares the converted access start date with corrected real-time, and determines the legitimacy of access in question. <P>COPYRIGHT: (C)2013,JPO&INPIT |
