公开(公告)号：EP1179240B1

公开(公告)日：2014-01-08

申请号：EP01920243.1

申请日：2001-03-09

申请人： Panasonic Corporation

发明人： MATSUSHIMA, Hideki ,  TOKUDA, Katsumi ,  HARADA, Shunji ,  HIROTA, Teruto ,  INOUE, Shinji

IPC分类号： G11B20/00 ,  G11B20/10 ,  G11B27/031 ,  G11B27/034 ,  G11B27/11 ,  G11B27/34 ,  G11B19/12 ,  G11C7/16 ,  G06F21/10

CPC分类号： G11C7/16 ,  G06F21/10 ,  G06F2221/0777 ,  G06F2221/2135 ,  G06F2221/2147 ,  G06F2221/2153 ,  G11B19/122 ,  G11B20/00086 ,  G11B20/00094 ,  G11B20/00166 ,  G11B20/00746 ,  G11B20/00768 ,  G11B27/031 ,  G11B27/034 ,  G11B27/11 ,  G11B27/34 ,  G11B2020/10546 ,  G11B2220/2545 ,  G11B2220/2562 ,  G11B2220/60 ,  G11B2220/61 ,  G11C2207/16

公开(公告)号：EP1066633B1

公开(公告)日：2009-01-28

申请号：EP99970202.0

申请日：1999-10-07

申请人： Panasonic Corporation

发明人： TAGAWA, Kenji ,  MINAMI, Masataka ,  KOZUKA, Masayuki ,  AOYAMA, Shoichi ,  TOKUDA, Katsumi ,  HIRATA, Noboru

IPC分类号： G11B20/10

CPC分类号： G11B20/00492 ,  G11B20/00086 ,  G11B20/0021 ,  G11B20/00253

摘要： A recording medium stores a retail content and a superdistribution content that is encrypted according to a block cryptosystem. A superdistribution header is attached to the superdistribution content and encrypted according to a public key cryptosystem. The superdistribution header contains a decryption key used to decrypt the block cryptosystem. The public key cryptosystem is characterized by using a device connected to a communication network for decryption. The decryption is performed when the recording medium is loaded into the device with a fee being charged via the communication network.

公开(公告)号：EP1493258B1

公开(公告)日：2011-11-02

申请号：EP03715638.7

申请日：2003-03-31

申请人： Panasonic Corporation

发明人： HIGASHI, Akio ,  TOKUDA, Katsumi ,  OHMORI, Motoji ,  INOUE, Mitsuhiro

IPC分类号： H04L29/06

CPC分类号： H04L63/10 ,  G06F21/10 ,  H04L2463/101

摘要： The present content using system is composed of a content importing apparatus and at least one content using apparatus. The content importing apparatus includes a content ID generating unit that generates a content ID and a content key information encryption converting unit that converts the encryption of content key information using an encryption key ('network key') that is shared in advance on the network. The content using apparatus includes a content key information decrypting unit that decrypts the content key information, whose encryption has been converted, using the network key, a moved content list storing unit for storing a moved content list (MCL) in which the content IDs of contents that have been written onto a storage medium are written, and a moved content list managing unit that judges whether the writing of a content is permitted or prohibited based on the MCL.

公开(公告)号：EP1393147B1

公开(公告)日：2013-05-15

申请号：EP02733369.9

申请日：2002-06-06

申请人： Panasonic Corporation

发明人： OKAMOTO, Ryuichi ,  TOKUDA, Katsumi ,  MIURA, Kouji

IPC分类号： G06F21/10

CPC分类号： G06F21/10