Patent ID: 9363081
Filing Date: 2016-06-07
CPC Classification: G06F,H04L

Claim Text:
1. A license administration device which manages grant or denial of functions in a plurality of licensee devices, comprising: a key store part configured to store a default key restricting a predetermined function and an upgrade key activating the predetermined function in connection with the key information unique to each licensee device, the default key preventing each licensee device from applying any upgrade key; a key extraction part configured to extract the default key or the upgrade key in connection with each licensee device in response to a licenser issuing a license change request representing an identification of each licensee device and the predetermined function to be restricted or activated; and a key application part configured to overwrite the key information of the licensee device with the default key in response to the license change request restricting the predetermined function, wherein, upon receiving the license change request activating the predetermined function after overwriting the key information of the licensee device with the default key, the key application part applies the upgrade key to the key information of the licensee device.