Recording Device, Recording Medium, and Content Protection System
    5.
    发明申请
    Recording Device, Recording Medium, and Content Protection System 失效
    录音设备,录音媒体和内容保护系统

    公开(公告)号:US20070258587A1

    公开(公告)日:2007-11-08

    申请号:US11578571

    申请日:2005-03-22

    摘要: A recording/playback apparatus is capable of using pre-image-converted content in a case of transferring an image-converted content to another device, then back from transfer-destination device to the recording/playback apparatus. The recording/playback apparatus includes a storage unit that stores a first encrypted content generated by encrypting the content, a second encrypted content generated by performing an irreversible compression to convert the content, thereby obtaining a converted content, and by encrypting the converted content, and a content key for decryption of the first and second encrypted contents, a key transfer unit that writes the content key to the external recording medium, and erases the content key stored in the storage unit, and a content transfer unit that, after the content key has been erased, writes the second encrypted content to the external recording medium, and erases the second encrypted content from the storage unit.

    摘要翻译: 在将图像转换内容传送到另一设备,然后从传送目的地设备返回到记录/重放设备的情况下,记录/重放设备能够使用预先转换图像的内容。 记录/重放装置包括存储单元,其存储通过对内容进行加密而生成的第一加密内容,通过执行不可逆压缩而生成的第二加密内容来转换内容,从而获得转换的内容,并且通过加密转换的内容,以及 用于解密第一和第二加密内容的内容密钥,将内容密钥写入外部记录介质的密钥传送单元,并且擦除存储在存储单元中的内容密钥;以及内容传送单元,在内容密钥 已经被擦除,将第二加密内容写入外部记录介质,并从存储单元擦除第二加密内容。

    Recording device, recording medium, and content protection system
    6.
    发明授权
    Recording device, recording medium, and content protection system 失效
    记录装置,记录介质和内容保护系统

    公开(公告)号:US07889863B2

    公开(公告)日:2011-02-15

    申请号:US11578571

    申请日:2005-03-22

    摘要: A recording/playback apparatus is capable of using pre-image-converted content in a case of transferring an image-converted content to another device, then back from transfer-destination device to the recording/playback apparatus. The recording/playback apparatus includes a storage unit that stores a first encrypted content generated by encrypting the content, a second encrypted content generated by performing an irreversible compression to convert the content, thereby obtaining a converted content, and by encrypting the converted content, and a content key for decryption of the first and second encrypted contents, a key transfer unit that writes the content key to the external recording medium, and erases the content key stored in the storage unit, and a content transfer unit that, after the content key has been erased, writes the second encrypted content to the external recording medium, and erases the second encrypted content from the storage unit.

    摘要翻译: 在将图像转换内容传送到另一设备,然后从传送目的地设备返回到记录/重放设备的情况下,记录/重放设备能够使用预先转换图像的内容。 记录/重放装置包括存储单元,其存储通过对内容进行加密而生成的第一加密内容,通过执行不可逆压缩而生成的第二加密内容来转换内容,从而获得转换的内容,并且通过加密转换的内容,以及 用于解密第一和第二加密内容的内容密钥,将内容密钥写入外部记录介质的密钥传送单元,并且擦除存储在存储单元中的内容密钥;以及内容传送单元,在内容密钥 将第二加密内容写入外部记录介质,并从存储单元擦除第二加密内容。

    Recording/Reproduction Device And Content Protection System
    8.
    发明申请
    Recording/Reproduction Device And Content Protection System 审中-公开
    记录/再现设备和内容保护系统

    公开(公告)号:US20070283442A1

    公开(公告)日:2007-12-06

    申请号:US10587513

    申请日:2005-02-01

    IPC分类号: H04L9/00

    摘要: A recording/reproduction device 10 receives content broadcast from a content provision device 11. The recording/reproduction device 10 encrypts the received content using a device key, to generate first encrypted content. The recording/reproduction device 10 decrypts the first encrypted content to obtain the content, performs an image conversion on the obtained content to generate converted content, and encrypts the converted content using a medium key to generate second encrypted content. The recording/reproduction device 10 writes the second encrypted content, the medium key, and the device key to a portable medium 14. When the portable medium 14 is inserted in a mobile information terminal 15, the mobile information terminal 15 decrypts the second encrypted content using the medium key to obtain the converted content, and reproduces the converted content.

    摘要翻译: 记录/再现装置10从内容提供装置11接收内容广播。 记录/再现设备10使用设备密钥加密所接收的内容,以产生第一加密内容。 记录/再现设备10解密第一加密内容以获取内容,对所获得的内容执行图像转换以生成转换的内容,并且使用中密钥对转换的内容进行加密以生成第二加密内容。 记录/再现设备10将第二加密内容,媒体密钥和设备密钥写入便携式介质14。 当便携式媒体14被插入到移动信息终端15中时,移动信息终端15使用媒体密钥解密第二加密内容以获得转换的内容,并且再现转换的内容。