Information collection system, information collection method, and non-transitory computer readable medium storing control program

1. An information collection system located in an anonymous network, comprising:

hardware including at least one processor and at least one memory; and

a hidden service providing system implemented at least by the hardware and that provides a hidden service appropriate to a hidden service request received from a user device through the anonymous network to the user device through the anonymous network;

an information collection unit implemented at least by the hardware and that collects information about the provided hidden service; and

an address posting unit implemented at least by the hardware and that posts address information of the hidden service provided by the hidden service providing system to a posting target server located in the anonymous network and providing another hidden service, wherein

the hidden service providing system comprises:

an acquisition unit implemented at least by the hardware and configured to acquire a service result appropriate to the hidden service request received from the user device from a surface service server outside the anonymous network; and

a service result providing unit implemented at least by the hardware and configured to provide the acquired service result to the user device as a result by the hidden service of the hidden service providing system.

2. The information collection system according to claim 1 , wherein the address posting unit changes the address information of the hidden service providing system at regular intervals and posts the changed address information of the hidden service providing system to the posting target server each of a plurality of times a change is made.

3. An information collection method comprising:

posting, by an address posting unit of an information collection system located in an anonymous network and implemented using hardware including at least one processor and at least one memory, address information of a second hidden service provided by a hidden service providing system included in the information collection system to a posting target server located in the anonymous network and providing a first hidden service;

providing, by the hidden service providing system, the second hidden service in response to a hidden service request transmitted from a user device by using the posted address information; and

collecting, by an information collection unit in the information collection system and implemented using the hardware, information about the provided second hidden service, wherein

the providing includes acquiring a service result appropriate to the hidden service request received from the user device from a surface service server outside the anonymous network; and providing the acquired service result to the user device as a result by the hidden service of the hidden service providing system.

4. A non-transitory computer readable medium storing a control program causing an information collection system located in an anonymous network to perform processing of:

posting address information of a second hidden service provided by the information collection system to a posting target server located in the anonymous network and providing a first hidden service;

providing the second hidden service in response to a hidden service request transmitted from a user device by using the posted address information; and

collecting information about the provided second hidden service, wherein

the providing includes acquiring a service result appropriate to the hidden service request received from the user device from a surface service server outside the anonymous network; and providing the acquired service result to the user device as a result by the hidden service of the hidden service providing system.