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专利名称：Data recording/reproducing method, data
recording/reproducing system, recordingapparatus
发明人：Masazumi Yamada,Hiroyuki Iitsuka,Shoichi
Goto,Hideaki Takechi
申请号：US09381996申请日：19990125公开号：US07239709B1公开日：20070703
专利附图：
摘要：A data recording/reproducing method wherein encrypted digital data obtained
by subjecting digital data to first encrypting by using a contents key and encryptedcontents key obtained by subjecting the contents key to second encrypting are recordedon a recording medium, the encrypted digital data and the encrypted contents key,having been recorded, are reproduced, and the encrypted digital data is decrypted byusing the contents key obtained by decrypting the encrypted contents key, thereby toobtain the digital data.
申请人：Masazumi Yamada,Hiroyuki Iitsuka,Shoichi Goto,Hideaki Takechi
地址：Moriguchi JP,Katano JP,Katano JP,Osaka JP
国籍：JP,JP,JP,JP
代理机构：RatnerPrestia
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