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    MEDIA STORAGE STRUCTURES FOR STORING CONTENT, DEVICES FOR USING SUCH STRUCTURES, SYSTEMS FOR DISTRIBUTING SUCH STRUCTURES
    32.
    发明申请
    MEDIA STORAGE STRUCTURES FOR STORING CONTENT, DEVICES FOR USING SUCH STRUCTURES, SYSTEMS FOR DISTRIBUTING SUCH STRUCTURES 审中-公开
    用于存储内容的媒体存储结构，使用这种结构的设备，用于分配此类结构的系统

    公开(公告)号：US20160204939A1

    公开(公告)日：2016-07-14

    申请号：US15074914

    申请日：2016-03-18

    Applicant: Apple Inc.

    Inventor： Augustin J. Farrugia ,  Gianpaolo Fasoli ,  Bertrand Mollinier Toublet ,  Mathieu Ciet

    IPC: H04L9/32

    CPC classification number: H04L9/32 ,  G06F21/10 ,  G06F21/602

    Abstract: Some embodiments of the invention provide a content-distribution system for distributing content under a variety of different basis. For instance, in some embodiments, the content-distribution system distributes device-restricted content and device-unrestricted content. Device-restricted content is content that can only be played on devices that the system associates with the particular user. Device-unrestricted content is content that can be played on any device without any restrictions. However, for at least one operation or service other than playback, device-unrestricted content has to be authenticated before this operation or service can be performed on the content. In some embodiments, the system facilitates this authentication by specifying a verification parameter for a piece of device-unrestricted content. The content-distribution system of some embodiments has a set of servers that supply (1) media storage structures that store content, (2) cryptographic keys that are needed to decrypt device-restricted content, and (3) verification parameters that are needed to verify device-unrestricted content. In some embodiments, the device that receives the media storage structure inserts the received cryptographic key or verification parameter in the received media storage structure. In some embodiments, the set of servers also supply cryptographic content keys for the device-unrestricted content. These keys are used to decrypt the content upon arrival, upon first playback, or at some other time. However, some embodiments do not store these cryptographic keys in the media storage structures for the device-unrestricted content.

    Abstract translation: 本发明的一些实施例提供了一种用于在各种不同基础下分发内容的内容分发系统。 例如，在一些实施例中，内容分发系统分发受设备限制的内容和设备无限制的内容。 设备限制内容是只能在系统与特定用户关联的设备上播放的内容。 设备无限制的内容是可以在任何设备上播放的内容，没有任何限制。 然而，对于除播放之外的至少一个操作或服务，在可以对内容执行该操作或服务之前必须认证设备无限制的内容。 在一些实施例中，系统通过为一片设备无限制内容指定验证参数来促进该认证。 一些实施例的内容分发系统具有一组服务器，其提供（1）存储内容的媒体存储结构，（2）解密设备限制的内容所需的密码密钥，以及（3）需要的验证参数 验证设备无限制的内容。 在一些实施例中，接收媒体存储结构的设备将接收到的加密密钥或验证参数插入接收到的媒体存储结构中。 在一些实施例中，该组服务器还提供用于设备无限制内容的加密内容密钥。 这些密钥用于在到达时，首次播放时或在其他时间对内容进行解密。 然而，一些实施例不将这些加密密钥存储在用于设备无限制内容的媒体存储结构中。

    CONTROLLING USE OF SHARED CONTENT ITEMS BASED ON CLIENT DEVICE
    33.
    发明申请
    CONTROLLING USE OF SHARED CONTENT ITEMS BASED ON CLIENT DEVICE 有权
    基于客户端设备控制共享内容项的使用

    公开(公告)号：US20160019375A1

    公开(公告)日：2016-01-21

    申请号：US14634405

    申请日：2015-02-27

    Applicant: Apple Inc.

    Inventor： Gianpaolo Fasoli ,  Apoorva Govind ,  Augustin J. Farrugia ,  Raffi T. Khatchadourian

    IPC: G06F21/10 ,  H04L29/06 ,  G06F17/30

    CPC classification number: G06F21/10 ,  G06F17/30321 ,  G06F2221/0717 ,  H04L63/061 ,  H04L63/104 ,  H04L2463/101 ,  H04N21/2541 ,  H04N21/63345 ,  H04W4/60

    Abstract: User accounts can be linked together to form a group of linked user accounts that can access content items assigned to the other user accounts in the group. A user can download content items assigned to their user account, as well as shared content items assigned to one of the other user accounts in the group of linked user accounts. Use of shared content items can be restricted to client devices running specified versions of an operating system. The key ID tagged to a shared content item can be altered such that the key ID no longer correctly identifies the corresponding DRM key that enables use of the shared content item. Client devices authorized to use shared content items can be configured to recognize that a content item is a shared content item and generate the original key ID form the altered key ID.

    Abstract translation: 用户帐户可以链接在一起，形成一组可以访问分配给组中其他用户帐户的内容项的关联用户帐户。 用户可以下载分配给其用户帐户的内容，以及分配给链接的用户帐户组中的其他用户帐户之一的共享内容项。 可以将共享内容项的使用限制为运行指定版本的操作系统的客户端设备。 可以改变标记为共享内容项的密钥ID，使得密钥ID不再正确地识别能够使用共享内容项的相应DRM密钥。 授权使用共享内容项目的客户端设备可以被配置为识别内容项目是共享内容项目，并且从改变的密钥ID生成原始密钥ID。

    PROTECTING SOFTWARE THROUGH A FAKE CRYPTOGRAPHIC LAYER
    34.
    发明申请
    PROTECTING SOFTWARE THROUGH A FAKE CRYPTOGRAPHIC LAYER 有权
    通过一个假的CRYPTOGRAPHIC层保护软件

    公开(公告)号：US20150363580A1

    公开(公告)日：2015-12-17

    申请号：US14306713

    申请日：2014-06-17

    Applicant: Apple Inc.

    Inventor： Pierre Betouin ,  Augustin J. Farrugia ,  Benoit Chevallier-Mames ,  Bruno Kindarji ,  Cédric Tessier ,  Jean-Baptiste Aviat ,  Mathieu Ciet ,  Thomas Icart

    IPC: G06F21/14 ,  G06F9/45

    CPC classification number: G06F21/14 ,  G06F2221/0748

    Abstract: The fake cryptographic layer obfuscation technique can be used to lure an attacker into expending reverse engineering efforts on sections of code the attacker would normally ignore. To do this the obfuscation technique can identify sections of code that are likely to be of lesser interest to the attacker and disguise them as higher value sections. This can be achieved by transforming a lower value section of code to include code patterns, constants, or other characteristics known to exist in sections of code of higher value, such as cryptographic routines. To transform a code section, the obfuscation technique can use one or more program modifications including control flow modifications, constant value adjustments to simulate well-known cryptographic scalars, buffer extensions, fake characteristic table insertion, debug-like information insertion, derivation function-code generation linking, and/or cryptographic algorithm specific instruction insertion.

    Abstract translation: 伪造的加密层混淆技术可以用来诱骗攻击者在攻击者通常忽略的代码段上花费逆向工程的努力。 为此，混淆技术可以识别可能对攻击者感兴趣的代码段，并将其伪装成较高的值段。 这可以通过将代码的较低值部分转换为包括已知存在于较高值的代码部分中的代码模式，常量或其他特性来实现，例如加密例程。 为了转换代码部分，混淆技术可以使用一个或多个程序修改，包括控制流修改，常数值调整以模拟公知的加密标量，缓冲区扩展，伪特征表插入，类似调试的信息插入，导出函数代码 生成链接和/或加密算法特定指令插入。

    Protecting Cryptographic Operations Using Conjugacy Class Functions
    35.
    发明申请
    Protecting Cryptographic Operations Using Conjugacy Class Functions 有权
    使用Conjugacy类函数保护加密操作

    公开(公告)号：US20150349951A1

    公开(公告)日：2015-12-03

    申请号：US14291591

    申请日：2014-05-30

    Applicant: Apple Inc.

    Inventor： Augustin J. Farrugia ,  Benoit Chevallier-Mames ,  Bruno Kindarji ,  Mathieu Ciet ,  Thomas Icart

    IPC: H04L9/06

    CPC classification number: H04L9/0631 ,  G06F9/30007 ,  G09C1/00 ,  H04L2209/16 ,  H04L2209/603 ,  H04L2209/76

    Abstract: Some embodiments provide for an improved method for performing AES cryptographic operations. The method applies a look up table operation that includes several operations embedded within look up tables. The embedded operations include a permutation operation to permute several bytes of AES state, a multiplication operation to apply a next round's protection to the AES state, an affine function and an inverse affine function to conceal the multiplication operation, and an inverse permutation operation to remove a previous round's protection. Some embodiments provide for an optimized method for efficiently performing such protected AES operations. The method alternates rounds of AES processing between software processing (e.g. processing by a CPU, performed according to software instructions) and hardware processing (e.g. processing by cryptographic ASIC).

    Abstract translation: 一些实施例提供了用于执行AES加密操作的改进方法。 该方法应用查询表操作，其中包含嵌入在查找表中的多个操作。 嵌入式操作包括将AES状态置换几个字节的置换操作，将下一轮的保护应用于AES状态的乘法运算，用于隐藏乘法运算的仿射函数和反向仿射函数以及用于去除的逆置换操作 前一轮的保护。 一些实施例提供了用于有效执行这种受保护的AES操作的优化方法。 该方法在软件处理（例如，CPU的处理，根据软件指令执行）和硬件处理（例如通过加密ASIC的处理）之间交替进行AES处理。

    METHODS AND APPARATUS FOR CORRELATION PROTECTED PROCESSING OF DATA OPERATIONS
    37.
    发明申请
    METHODS AND APPARATUS FOR CORRELATION PROTECTED PROCESSING OF DATA OPERATIONS 有权
    数据操作的相关保护处理方法和装置

    公开(公告)号：US20140165030A1

    公开(公告)日：2014-06-12

    申请号：US13707437

    申请日：2012-12-06

    Applicant: APPLE INC.

    Inventor： Benoit Chevallier-Mames ,  Mathieu Ciet ,  Thomas Icart ,  Bruno Kindarji ,  Augustin J. Farrugia

    IPC: G06F9/44

    CPC classification number: G06F21/14

    Abstract: A method and an apparatus for receiving a first source code having a code block to update the first source code with multiple copies of the code block to protect against correlation attacks are described. The code block can perform one or more operations for execution based on the first source code. The operations can be performed via a random one of the copies of the code block. A second source code based on the updated first source code can be generated to be executed by a processor to produce an identical result as the first source code.

    Abstract translation: 描述了一种用于接收具有代码块的第一源代码的方法和装置，用于更新具有代码块的多个副本的第一源代码以防止相关攻击。 代码块可以执行一个或多个基于第一源代码执行的操作。 可以通过代码块的副本中的随机的一个执行操作。 可以生成基于更新的第一源代码的第二源代码以由处理器执行以产生与第一源代码相同的结果。

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