| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a method for particularizing a packet sender, capable of easily particularizing a terminal acting like a sender of illegitimate accesses. <P>SOLUTION: When an illegitimate terminal 1 transmits a data packet to an internal terminal 7 via packet relaying apparatuses 2 to 5, the internal terminal 7 generates a transmission packet to which a unique data tag comprising an initial value is attached, the packet relaying apparatuses 2 to 5 apply reversible arithmetic processing based on the unique data of a pre-stage apparatus and the unique data of its own apparatus to the unique data tag in the received packet to generate the transmission packet whose unique data tag is updated, and the internal terminal 7 applies arithmetic processing based on the unique data of the pre-stage apparatus to the unique data tag in the received packet to obtain the unique data of the illegitimate terminal. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
