| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a system for detecting (D) DoS attack and tracing it, and specifying attack points which facilitates criterion for determining whether or not it is the (D) DoS attack. <P>SOLUTION: The system is characterised by monitoring the number of field values existing in a packet transmitted through Internet circuit, and determining that an unauthorized attack is being implemented when the number of field values reach a prescribed number or a prescribed ratio within a certain time. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
