License management device, license management system, license management method, and program

摘要

This license management device causes a wireless device to be in a state in which all functions are restricted by overwriting key information of the wireless device with a default key which is unique to the wireless device. In addition, a key generation device generates an upgrade key which is unique to the wireless device and transmits the same to the license management device. Furthermore, the license management device can release restrictions of functionality in the wireless device by applying the upgrade key to the key information of the wireless device which has been overwritten with the default key.