Encryption and data-protection for content on portable medium
    5.
    发明申请
    Encryption and data-protection for content on portable medium 有权
    对便携式媒体上的内容进行加密和数据保护

    公开(公告)号:US20050114689A1

    公开(公告)日:2005-05-26

    申请号:US10945542

    申请日:2004-09-20

    摘要: A source generates a medium key (KM) and a media secret table including a plurality of entries, each entry including (KM) encrypted by a public key (PU-PD) of a plurality of devices, obtains the medium ID of a medium therefrom, generates a content key (KD) for a piece of content, encrypts the content with (KD) to result in (KD(content)), encrypts (KD) with (KM) to result in (KM(KD)), generates a package for the content including (KD(content)), (KM(KD)), the medium ID, and a signature based on at least the medium ID and verifiable with (KM), and copies the generated package and the media secret table to the medium. Thus, a device with the medium and a private key (PR-PD) corresponding to an entry of the media secret table can access and render the content.

    摘要翻译: 源产生包括多个条目的媒体密钥(KM)和媒体秘密表,每个条目包括通过多个设备的公钥(PU-PD)加密的(KM),从而获得介质的介质ID 生成内容的内容密钥(KD),用(KD)加密内容以得到(KD(内容)),用(KM)加密(KD)以生成(KM(KD))生成 用于包含(KD(内容)),(KM(KD)),介质ID以及基于至少介质ID的签名并且可以用(KM)验证的内容的包的包,并复制所生成的包和媒体秘密 表到中等。 因此,具有对应于媒体秘密表的条目的媒体和专用密钥(PR-PD)的设备可以访问和呈现内容。