| 摘要 |
PROBLEM TO BE SOLVED: To detect communication detected on a network of monitoring object, as communication satisfying predetermined reference.SOLUTION: An attack detector 20 includes a domain specification unit 21 for specifying a domain, i.e., the connection destination of communication detected on a network of monitoring object, a domain information acquisition unit 22 for acquiring relevant information, i.e., the information registered in association with the domain thus acquired, from a domain management device for holding the information of a domain registered for use in the Internet, a domain storage unit 23 for prestoring a domain of a bad connection destination and the relevant information of that domain, and an attack determination unit 24 for detecting as unauthorized communication, when the relevant information thus acquired has been stored in the domain storage unit 23.SELECTED DRAWING: Figure 2 |
