作者: Osamu Kawai , Masaki Yamashima
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摘要: An encrypted content and its encryption key under a copy right use condition of prohibiting by the device having received are stored, is copy-transferred with another through network, at same time, transferred so that it stored in either one devices. Even when high definition television broadcast signal copy-once taken as recorded, an access flag controls presence or absence reproduction for each provided. When original transcoded into low resolution, transfer to device, turned on, thereby making possible.