Data sending/receiving device and digital certificate issuing method

A data sending/receiving device for issuing a digital certificate to a new data sending/receiving device, when the data sending/receiving device causes the new data sending/receiving device to participate in a wireless network formed by a plurality of data sending/receiving devices including said data sending/receiving device and another data sending/receiving device each having a digital certificate that certifies authority to participate in the wireless network;

• the data sending/receiving device comprising:
• a first communication section which performs wireless communication in the wireless network;
• and
• a control section which performs a process of issuing the digital certificate;
• wherein
• when the new data sending/receiving device is connected to a second communication section of said another data sending/receiving device by a wired connection means, the control section of said data sending/receiving device judges whether or not the new data sending/receiving device is a device having a communication means that can communicate in the wireless network, in accordance with device type information of the new data sending/receiving device received via a second communication section of said another data sending/receiving device through the wired connection means from the new data sending/receiving device;
• and
• if the new data sending/receiving device is judged as a device having the communication means that can communicate in the wireless network, the control section of said data sending/receiving device creates a digital certificate for the new data sending/receiving device by using a device identifier specific to the new data sending/receiving device, the device identifier being received through the wired connection means via said another data sending/receiving device to which the new data sending/receiving device is connected from the new data sending/receiving device, and controls to send the created digital certificate through the wired connection means via said another data sending/receiving device to which the new data sending/receiving device is connected.

A digital certificate issuing method for issuing a digital certificate to a new data sending/receiving device when the new data sending/receiving device participates in a wireless network formed by a plurality of data sending/receiving devices each having a digital certificate that certifies authority to participate in the wireless network, the method comprising the steps of:

• connecting the new data sending/receiving device through a wired connection means to a certain data sending/receiving device participating in the wireless network;
• judging by the certain data sending/receiving device, whether or not the new data sending/receiving device is a device having a communication means that can communicate in the wireless network in accordance with device type information of the new data sending/receiving device received through the wired connection means from the new data sending/receiving device;
• and
• if the new data sending/receiving device is judged as being a device having a communication means that can communicate in the wireless network, creating a digital certificate for the new data sending/receiving device by using a device identifier specific to the new data sending/receiving device received from the new data sending/receiving device through the wired connection means and sending the created digital certificate to the new data sending/receiving device through the wired connection means, by the certain data sending/receiving device.

A digital certificate issuing method for issuing a digital certificate to a new data sending/receiving device when the new data sending/receiving device participates in a wireless network formed by a plurality of data sending/receiving devices including at least a first data sending/receiving device and a second data sending/receiving device each having a digital certificate that certifies authority to participate in the wireless network, the method comprising the steps of:

• connecting the new data sending/receiving device through a wired connection means to the second data sending/receiving device participating in the wireless network;
• judging, by the first data sending/receiving device forming the wireless network, whether or not the new data sending/receiving device is a device having a communication means that can communicate in the wireless network in accordance with device type information of the new data sending/receiving device received through the wired connection means and the second data sending/receiving device from the new data sending/receiving device;
• and
• if the first data sending/receiving device, which is other than the second data sending/receiving device to which the new data sending/receiving device is connected through the wired connection means, judges that the new data sending/receiving device is judged as being a device having a communication means that can communicate in the wireless network, creating a digital certificate for the new data sending/receiving device by using a device identifier specific to the new data sending/receiving device received via the second data sending/receiving device, to which the new data sending/receiving device is connected through the wired connection means, from the new data sending/receiving device and sending the created digital certificate via the second data sending/receiving device, to which the new data sending/receiving device is connected through the wired connection means, to the new data sending/receiving device, by the first data sending/receiving device.