Human body communication device, human body communication method, and program

1. A human body communication device comprising:

a control circuitry configured to

receive a notification from a first communication device, the notification indicating a security level of a process performed between the human body communication device and the first communication device using human body communication;

adjust a communication strength of the human body communication from an original state based on the security level of the process indicated by the notification;

after the communication strength is adjusted, perform a mutual authentication with the first communication device, and establish a session for the human body communication with the first communication device;

after the session is established, perform the process between the human body communication device and the first communication device using the human body communication using the adjusted communication strength; and

after performing the process, readjust the communication strength to the original state.

2. The human body communication device according to claim 1 , wherein

when the security level is higher than a predetermined threshold value, the control circuitry is configured to make the communication strength lower than a predetermined strength.

3. The human body communication device according to claim 1 , wherein

the control circuitry is configured to adjust the communication strength on the basis of a process for a connection with the first communication device.

4. The human body communication device according to claim 3 , wherein

the control circuitry is configured to adjust the communication strength, depending on whether or not communication connection with the first communication device is established.

5. The human body communication device according to claim 1 , wherein

the control circuitry is configured to adjust the communication strength depending on a type of the first communication device.

6. The human body communication device according to claim 1 , wherein

when the communication strength is adjusted by the control circuitry, the control circuitry is configured to readjust the communication strength after a predetermined time has elapsed from the adjustment of the communication strength.

7. The human body communication device according to claim 1 , wherein

when the communication strength is adjusted by the control circuitry, the control circuitry is configured to readjust the communication strength after the process ends.

8. The human body communication device according to claim 1 , wherein

when the communication strength is adjusted by the control circuitry, the control circuitry is configured to readjust the communication strength after another notification is sent from the first communication device.

9. The human body communication device according to claim 1 , wherein

the control circuitry is configured to adjust the communication strength in accordance with a consumption state of electric power of the human body communication device.

10. The human body communication device according to claim 1 , wherein

the process includes at least one of a process of payment and a process of personal information.

11. The human body communication device according to claim 1 , wherein

the communication strength includes at least one of a transmission strength and a reception strength.

12. The human body communication device according to claim 1 , wherein

the control circuitry is configured to

receive a beacon from the first communication device; and

transmit a response signal to the first communication device in response to receiving the beacon, and

the first communication device transmits the notification in response to receiving the response signal from the human body communication device.

13. A human body communication method comprising:

receiving a notification from a first communication device, the notification indicating a security level of a process performed between the human body communication device and the first communication device using human body communication;

adjusting, by a processor, a communication strength of the human body communication from an original state based on the security level of the process indicated by the notification;

after the communication strength is adjusted, performing, by the processor, a mutual authentication with the first communication device, and establish a session for the human body communication with the first communication device;

after the session is established, performing, by the processor, the process between the human body communication device and the first communication device using the human body communication using the adjusted communication strength; and

after performing the process, readjusting, by the processor, the communication strength to the original state.

14. A non-transitory, computer-readable medium storing a program for causing a computer to

receive a notification from a first communication device, the notification indicating a security level of a process performed between the human body communication device and the first communication device using human body communication;

adjust a communication strength of the human body communication from an original state based on the security level of the process indicated by the notification;

after the communication strength is adjusted, perform a mutual authentication with the first communication device, and establish a session for the human body communication with the first communication device;

after the session is established, perform the process between the human body communication device and the first communication device using the human body communication using the adjusted communication strength; and

after performing the process, readjust the communication strength to the original state.