| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an unauthorized access detecting service without deteriorating the communication quality in a network system which connect the digital information transmitting networks to each other. <P>SOLUTION: An information transfer processor 2 detects, by using simple processing, at high speed whether the information to be transferred is based on an unauthorized access, and transfers the information based on the authorized access as usual, and transfers only the information whose unauthorized access is suspected not to the original destination but to a detail testing device 3. The detail testing device 3 carefully and strictly checks whether the transferred information is based on an unauthorized access by comparing the information with the information in the unauthorized access database 6, and when the information is not based on the unauthorized access, transfers the information to the original destination, but when it is based on the unauthorized access, records the information in an information recording device 4 without transferring it to the original destination. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
