Patent ID: 8677484

Claim:
A system comprising: a detection unit, implemented in a computer, the detection unit configured to detect unauthorized access to a first of a plurality of information processing apparatuses that are virtually implemented by virtual machines executed by the computer; an authorized network configured to transfer authorized access to the plurality of information processing apparatuses from an external network; a honeypot network configured to transfer unauthorized access to the plurality of information processing apparatuses from the external network; and a control unit, implemented in the computer, the control unit configured to connect a second of the plurality of information processing apparatuses for which no unauthorized access has been detected to the authorized network, and connect the first of the plurality of information processing apparatuses for which unauthorized access has been detected to the honeypot network; wherein the control unit shifts, in response to detecting unauthorized access by the detection unit, the first of the plurality of information processing apparatuses into a decoy mode in which the detected unauthorized access is disconnected from a normal operation; the computer executes a first virtual machine and a second virtual machine that virtually implement the plurality of information processing apparatuses; on a condition that the system is operating normally, the control unit causes the information processing apparatus implemented by the first virtual machine to operate in a normal mode and causes the information processing apparatus implemented by the second virtual machine to operate in a standby mode in which the information processing apparatus is on standby to perform processing; and wherein, on a condition that unauthorized access to the information processing apparatus implemented by the first virtual machine is detected, the control unit shifts the information processing apparatus implemented by the first virtual machine from the normal mode into the decoy mode and shifts the information processing apparatus implemented by the second virtual machine from the standby mode into the normal mode.