专利名称：LICENSE ADMINISTRATION DEVICE AND
LICENSE ADMINISTRATION METHOD
发明人：KINOSHITA SHINGO,KAWADA KOJI申请号：EP12804925申请日：20120627公开号：EP2728504A4公开日：20150408
摘要：A license administration device manages grant or denial of each optionalfunction in a plurality of licensee devices. The licensee device stores key informationencrypted with a cipher key so as to issue a license change request activating or
restricting the predetermined optional function. Upon receiving a license change requestrestricting the predetermined optional function, the license administration deviceoverwrites the key information of the licensee device with a default key. Subsequently,upon receiving a license change request activating the predetermined optional function,the license administration device applies an upgrade key to the key information of thelicensee device. The default key or the upgrade key can be decrypted using a cipher keyunique to the licensee device. The license administration device manages the licensedmaximum for the predetermined optional function and reflects an increment ordecrement to the licensing maximum by applying the default key or the upgrade key.
申请人：NEC CORPORATION
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