INFORMATION SHARING DEVICE, INFORMATION SHARING METHOD, AND INFORMATION SHARING PROGRAM

摘要

PROBLEM TO BE SOLVED: To identify service such as an application to be a cause of cyber attack.SOLUTION: An information sharing device is included in each system in a communication system and refers to identification information on an attack source terminal to identify a system accommodating the terminal. When having identified the system including the information sharing device as the system accommodating the attack source terminal and the attack source terminal uses service of another system, the information sharing device transmits attack information to the other system. When the system is not the identified system, the information sharing device transmits attack information to the identified system. An information sharing device included in a system, in the case of receiving attack information from another information sharing device and the system provides service for an attack source terminal, identifies the service as an attack cause.