Cryptographic apparatus for performing cryptography on a specified area of content data
    1.
    发明授权
    Cryptographic apparatus for performing cryptography on a specified area of content data 失效
    用于在指定的内容数据区域上执行加密的加密装置

    公开(公告)号:US06971022B1

    公开(公告)日:2005-11-29

    申请号:US09593677

    申请日:2000-06-14

    CPC分类号: G06F21/602

    摘要: A cryptographic apparatus reads, from a portable storage medium, content data and cryptographic information specifying a certain part of the content data on which cryptographic processing is to be performed, specifies the certain part in the read content data based on the read cryptographic information, and performs one of encryption and decryption on the certain part. When, for example, the content data is formed from alternating headers and variable-length data sections, the cryptographic information is a program formed from an instruction sequence. The instruction sequence has the cryptographic apparatus detect a header in the content data, read the length of the variable-length data, and perform cryptographic processing on a part of the content data between a start point and an end point, the start point being a position relative to the header position, and the end point being a value resulting from adding the length to the start point.

    摘要翻译: 密码装置从便携式存储介质读取指定要进行加密处理的内容数据的特定部分的内容数据和密码信息,基于读取的密码信息指定读取的内容数据中的某一部分,以及 在某一部分执行加密和解密。 当例如内容数据由交替的头部和可变长度数据部分形成时,密码信息是由指令序列形成的程序。 指令序列具有密码装置检测内容数据中的标题,读取可变长度数据的长度,并对起始点和结束点之间的内容数据的一部分执行加密处理,起始点为 相对于头部位置的位置,并且终点是通过将长度添加到起始点而得到的值。

    Encryption device, key distribution device and key distribution system
    8.
    发明授权
    Encryption device, key distribution device and key distribution system 有权
    加密设备,密钥分发设备和密钥分发系统

    公开(公告)号:US08275998B2

    公开(公告)日:2012-09-25

    申请号:US12953676

    申请日:2010-11-24

    摘要: A key distribution system distributes key data for using content to a second encryption device that has been legitimately outsourced processing by a first encryption device. The first encryption device acquires permission information indicating that the first encryption device has permission to use the content, generates certification information by making an irreversible alteration the to permission information, and transmits the permission information and the certification information to the second encryption device. The second encryption device receives the permission information and the certification information, sends them to a key distribution device, and acquires the key data from the key distribution device. The key distribution device receives the permission information and the certification information, judges whether or not the certification information was generated by the by the first encryption device, and if judging in the affirmative, transmits the key data to the second encryption device.

    摘要翻译: 密钥分配系统将用于使用内容的密钥数据分配给已被第一加密设备合法外包处理的第二加密设备。 第一加密装置获取表示第一加密装置具有允许使用内容的许可信息,通过对许可信息进行不可逆变更来生成认证信息,并将许可信息和认证信息发送到第二加密装置。 第二加密装置接收许可信息和认证信息,将其发送到密钥分发装置,并从密钥分发装置获取密钥数据。 密钥分配装置接收许可信息和认证信息,判断认证信息是否由第一加密装置生成,并且如果肯定地判断,则将密钥数据发送到第二加密装置。

    SEMICONDUCTOR MEMORY CARD AND DATA READING APPARATUS, AND DATA READING/REPRODCUING APPARATUS
    9.
    发明申请
    SEMICONDUCTOR MEMORY CARD AND DATA READING APPARATUS, AND DATA READING/REPRODCUING APPARATUS 有权
    半导体存储卡和数据读取装置以及数据读取/修改装置

    公开(公告)号:US20120117663A1

    公开(公告)日:2012-05-10

    申请号:US13353689

    申请日:2012-01-19

    IPC分类号: G06F12/14

    摘要: A semiconductor memory card comprising a control IC 302, a flash memory 303, and a ROM 304. The ROM 304 holds information such as a medium ID 341 unique to the semiconductor memory card. The flash memory 303 includes an authentication memory 332 and a non-authentication memory 331. The authentication memory 332 can be accessed only by external devices which have been affirmatively authenticated. The non-authentication memory 331 can be accessed by external devices whether the external devices have been affirmatively authenticated or not. The control IC 302 includes control units 325 and 326, an authentication unit 321 and the like. The control units 325 and 326 control accesses to the authentication memory 332 and the non-authentication memory 331, respectively. The authentication unit 321 executes a mutual authentication with an external device.

    摘要翻译: 包括控制IC302,闪速存储器303和ROM304的半导体存储卡.ROM 304保存诸如半导体存储卡唯一的介质ID 341之类的信息。 闪速存储器303包括认证存储器332和非验证存储器331.认证存储器332可以仅被已被肯定认证的外部设备访问。 外部设备可以访问非认证存储器331,无论外部设备是否被肯定认证。 控制IC302包括控制单元325和326,认证单元321等。 控制单元325和326分别控制对认证存储器332和非验证存储器331的访问。 认证单元321执行与外部设备的相互认证。

    Content reproduction apparatus
    10.
    发明授权
    Content reproduction apparatus 有权
    内容再现装置

    公开(公告)号:US08140675B2

    公开(公告)日:2012-03-20

    申请号:US10580178

    申请日:2004-12-20

    IPC分类号: G06F15/173

    CPC分类号: G11B20/00086 G11B20/10

    摘要: A content reproduction apparatus (1) which reproduces digital contents, and includes a device key storage unit (110) holding a device key (110a) specific to the content reproduction apparatus (1) in a manner that does not allow access from outside the content reproduction apparatus (1). The content reproduction apparatus (1), also includes a device ID storage unit (19) holding device key index information (19a) that is in a one-to-one association with a device key (110a), an instruction code receiving unit (14a) receiving an instruction code to output index information, a device key index information obtainment processing unit (10a) outputting, to outside, the device key index information (19a) stored in the device ID storage unit (19) based on the instruction, and a device key index information output processing unit (11a).

    摘要翻译: 一种再现数字内容的内容再现装置(1),并且包括以不允许从内容外部访问的方式保存特定于内容再现装置(1)的设备密钥(110a)的设备密钥存储单元(110) 再现装置(1)。 内容再现装置(1)还包括与设备密钥(110a)一一对应的设备密钥索引信息(19a)的设备ID存储单元(19),指令代码接收单元 接收用于输出索引信息的指令代码的设备密钥索引信息获取处理单元,基于该指令将存储在设备ID存储单元中的设备密钥索引信息(19a)输出到外部, 和设备密钥索引信息输出处理单元(11a)。