公开(公告)号：US08806215B2

公开(公告)日：2014-08-12

申请号：US13604914

申请日：2012-09-06

Applicant: Sherman Xuemin Chen ,  Stephane Rodgers

Inventor： Sherman Xuemin Chen ,  Stephane Rodgers

IPC: H04L9/32 ,  H04N7/167

CPC classification number: H04H20/31 ,  G06T1/0021 ,  H04H2201/50 ,  H04N5/4401 ,  H04N19/44 ,  H04N19/467 ,  H04N21/23892 ,  H04N21/43853 ,  H04N21/8358

Abstract: Methods and systems for robust watermark insertion and extraction for digital set-top boxes are disclosed and may include descrambling, detecting watermarking messages in a received video signal utilizing a watermark message parser, and immediately watermarking the descrambled video signal utilizing an embedded CPU. The embedded CPU may utilize code that may be signed by an authorized key, encrypted externally to the chip, decrypted, and stored in memory in a region off-limits to other processors. The video signal may be watermarked in a decompressed domain. The enabling of the watermarking may be verified utilizing a watchdog timer. The descriptors corresponding to the watermarking may be stored in memory that may be inaccessible by the main CPU. The watermark may comprise unique identifier data specific to the chip and a time stamp, and may be encrypted utilizing an on-chip combinatorial function.

Abstract translation: 公开了用于数字机顶盒的鲁棒水印插入和提取的方法和系统，并且可以包括解扰，利用水印消息解析器检测接收到的视频信号中的水印消息，并立即利用嵌入式CPU对解扰的视频信号进行加水印。 嵌入式CPU可以利用可以通过授权密钥进行签名的代码，在芯片外部加密，解密并存储在与其他处理器不同的区域的存储器中。 视频信号可以在解压缩域中加水印。 可以使用看门狗定时器来验证水印的使能。 与水印相对应的描述符可以存储在主CPU可能无法访问的存储器中。 水印可以包括专用于芯片的唯一标识符数据和时间标记，并且可以使用片上组合功能进行加密。

公开(公告)号：US08560829B2

公开(公告)日：2013-10-15

申请号：US11558650

申请日：2006-11-10

Applicant: Stephane Rodgers ,  Xuemin Chen

Inventor： Stephane Rodgers ,  Xuemin Chen

IPC: H04L29/06

CPC classification number: G06F21/10 ,  G06F21/445 ,  G06F21/51 ,  G06F21/606 ,  H04L9/0656 ,  H04L9/0844 ,  H04L2209/12

Abstract: Aspects of a method and system for command interface protection to achieve a secure interface are provided. A host device may encrypt a command based on a key index generated within the host device, a host device key, a command count, a random number from a slave device, at least one host control word, and a host variable value. The encrypted command may be communicated to the slave device where it may be decrypted based on the key index, the host device key decrypted from a slave device key generated by the slave device, the command count, the random number, at least one slave control word, and a slave variable value. The key index may be utilized in the host and slave devices to select a master key from a key table from which generational derivatives may be generated for command encryption and decryption respectively.

Abstract translation: 提供了一种用于命令接口保护以实现安全接口的方法和系统。 主机设备可以基于在主设备内生成的密钥索引，主机设备密钥，命令计数，来自从设备的随机数，至少一个主机控制字和主机变量值来加密命令。 加密命令可以被传送到从设备，其中它可以基于密钥索引被解密，从从设备生成的从设备密钥解密的主机设备密钥，命令计数，随机数，至少一个从控制 字和从​​变量值。 密钥索引可以用在主设备和从设备中，从分别为命令加密和解密生成代数导数的密钥表中选择主密钥。

公开(公告)号：US20090147985A1

公开(公告)日：2009-06-11

申请号：US11952789

申请日：2007-12-07

Applicant: Xuemin Chen ,  Stephane Rodgers

Inventor： Xuemin Chen ,  Stephane Rodgers

IPC: G06K9/00

CPC classification number: H04N19/467 ,  G06F21/16 ,  G06T1/0085 ,  G06T2201/0053 ,  H04N19/48 ,  H04N21/23892 ,  H04N21/8358

Abstract: Methods and systems for secure watermark embedding and extraction data flow architecture are disclosed and may include embedding a watermark in a video signal utilizing an embedded CPU. The embedded CPU may be controlled utilizing a security processor via a secure bus. The watermark may be embedded in a compressed video signal that may be diverted around a compression/decompression engine. The watermark may be embedded in a decompressed video signal and may be directed through a compression/decompression engine. Requests may be sent to the embedded CPU from the main CPU via the security processor and the secure bus. The watermark may be encrypted utilizing the security processor. The secure bus may be inaccessible to the main CPU or any device not on the chip. The chip may be disabled when the embedded CPU may be disabled. Sections of the video signal may be classified and selected for embedding.

Abstract translation: 公开了用于安全水印嵌入和提取数据流架构的方法和系统，并且可以包括使用嵌入式CPU在视频信号中嵌入水印。 可以通过安全总线来利用安全处理器来控制嵌入式CPU。 可以将水印嵌入压缩视频信号中，该视频信号可以围绕压缩/解压缩引擎转向。 水印可以嵌入在解压缩的视频信号中，并且可以通过压缩/解压缩引擎来引导。 请求可以通过安全处理器和安全总线从主CPU发送到嵌入式CPU。 可以使用安全处理器来加密水印。 主CPU或不在芯片上的任何设备可能无法访问安全总线。 当嵌入式CPU可能被禁用时，芯片可能会被禁止。 视频信号的部分可以被分类和选择用于嵌入。

公开(公告)号：US20080086657A1

公开(公告)日：2008-04-10

申请号：US11753474

申请日：2007-05-24

Applicant: Xuemin Chen ,  Andrew Dellow ,  Iue-Shuenn Chen ,  Stephane Rodgers

Inventor： Xuemin Chen ,  Andrew Dellow ,  Iue-Shuenn Chen ,  Stephane Rodgers

IPC: G06F11/07 ,  G06F12/14

CPC classification number: H04N21/4432 ,  G06F11/1433 ,  G06F21/572 ,  H04N21/4586 ,  H04N21/818

Abstract: Methods and systems for software security in a secure communication system are disclosed and may include verifying downloaded code in a reprogrammable system and reloading prestored unmodifiable first stage code upon failure. The prestored unmodifiable first stage code, which may comprise boot code for the reprogrammable system, may be stored in locked flash, and the downloaded software code may be stored in unlocked flash. The downloaded software code may be verified by comparing a signature of the downloaded code to a private key. A first sticky bit may be utilized to indicate a failure of the verification and a second sticky bit may be utilized to indicate passing of the verification and the use of the downloaded software code. Whether to reset the reprogrammable system and reload the prestored unmodifiable first stage code may be determined from within the reprogrammable system, which may comprise a set-top box.

Abstract translation: 公开了用于安全通信系统中的软件安全性的方法和系统，并且可以包括验证可再编程系统中的下载代码，并且在故障时重新加载预先存储的不可修改的第一级代码。 预先存储的不可修改的第一级代码（其可以包括用于可重新编程系统的引导代码）可以存储在锁定的闪存中，并且下载的软件代码可以存储在解锁的闪存中。 可以通过将下载的代码的签名与私钥进行比较来验证下载的软件代码。 可以使用第一粘性位来指示验证失败，并且可以利用第二粘性位来指示验证的传递和下载的软件代码的使用。 是否重置可编程系统并重新加载预先存储的不可修改的第一级代码可以在可重编程系统内确定，其可以包括机顶盒。

公开(公告)号：US20080084273A1

公开(公告)日：2008-04-10

申请号：US11753338

申请日：2007-05-24

Applicant: Stephane Rodgers ,  Andrew Dellow ,  Xuemin Chen ,  Iue-Shuenn Chen

Inventor： Stephane Rodgers ,  Andrew Dellow ,  Xuemin Chen ,  Iue-Shuenn Chen

IPC: G05B19/00

CPC classification number: G06F21/6209 ,  G06F21/77

Abstract: Securely loading code in a security processor may include autonomous fetching an encrypted security data set, which may comprise security code and/or root keys, by a security processor integrated within a chip. The encrypted security data set may be decrypted via the on-chip security processor and the decrypted code set may be validated on-chip using an on-chip locked value. The on-chip locked value may be stored in a one-time programmable read-only memory (OTP ROM) and may include security information generated by applying one or more security algorithms, for example SHA-based algorithms, to the security data set. The encryption of the security data set may utilize various security algorithms, for example AES-based algorithms. The on-chip locked value may be created and locked after a virgin boot of a device that includes the security processor. The security data set may be authenticated during the virgin boot of the device.

Abstract translation: 在安全处理器中安全地加载代码可以包括通过集成在芯片内的安全处理器来自主地获取可以包括安全代码和/或根密钥的加密安全数据集。 加密的安全数据集可以经由片上安全处理器解密，并且解码的代码集可以使用片上锁定值在片上进行验证。 片上锁定值可以存储在一次性可编程只读存储器（OTP ROM）中，并且可以包括通过将一个或多个安全算法（例如基于SHA的算法）应用于安全数据集而生成的安全信息。 安全数据集的加密可以利用各种安全算法，例如基于AES的算法。 在包含安全处理器的设备的初始引导之后，可以创建和锁定片上锁定值。 安全数据集可以在设备的初始启动期间被认证。

公开(公告)号：US08762719B2

公开(公告)日：2014-06-24

申请号：US13614834

申请日：2012-09-13

Applicant: Stephane Rodgers ,  Xuemin Chen

Inventor： Stephane Rodgers ,  Xuemin Chen

IPC: H04L9/32

CPC classification number: H04L63/06 ,  G06F21/31 ,  G06F21/606 ,  G06F2221/2129 ,  H04L63/0428 ,  H04N7/163 ,  H04N21/4143 ,  H04N21/4367 ,  H04N21/443

Abstract: Aspects of a method and system for command authentication to achieve a secure interface are provided. Command authentication between a host and a slave device in a multimedia system may be achieved by on-the-fly pairing or by an automatic one-time-programming via a security processor. In an on-the-fly pairing scheme, the host may generate a host key based on a host root key and host control words while the slave may generate slave key based the host key, a slave root key and slave control words. The slave key may be stored and later retrieved by the slave device to obtain the host key for authenticating host commands. The host may be disabled from generating and/or passing the host key to the slave. In an automatic one-time programming scheme, the security processor may burn a random number onto a onetime-programmable memory in the host and slave devices for command authentication.

Abstract translation: 提供了用于实现安全接口的命令认证的方法和系统的方面。 多媒体系统中的主机和从设备之间的命令认证可以通过即时配对或通过安全处理器的自动一次编程来实现。 在实时配对方案中，主机可以基于主机根密钥和主机控制字生成主机密钥，而从机​​可以基于主机密钥，从根密钥和从控制字生成从机密钥。 从属密钥可以被从设备存储和稍后检索以获得用于认证主机命令的主机密钥。 可能禁用主机生成和/或将主机密钥传递到从设备。 在自动一次性编程方案中，安全处理器可以将随机数刻录到主机和从设备中的一次可编程存储器上用于命令认证。

公开(公告)号：US08528102B2

公开(公告)日：2013-09-03

申请号：US11753414

申请日：2007-05-24

Applicant: Xuemin Chen ,  Iue Shuenn Chen ,  Stephane Rodgers ,  Andrew Dellow

Inventor： Xuemin Chen ,  Iue Shuenn Chen ,  Stephane Rodgers ,  Andrew Dellow

IPC: G06F7/04

CPC classification number: G06F21/629 ,  G06F21/572 ,  H04N7/163 ,  H04N21/42692 ,  H04N21/4432 ,  H04N21/4627 ,  H04N21/818

Abstract: Methods and systems for protection of customer secrets in a secure reprogrammable system are disclosed, and may include controlling, via hardware logic and firmware, access to customer specific functions. The firmware may comprise trusted code, and may comprise boot code, stored in non-volatile memory, which may comprise read only memory, or a locked flash memory. A customer mode may be checked via the trusted code prior to allowing downloading of code written by a customer to the reprogrammable system. Access to customer specific functions may be restricted via commands from a trusted source. The hardware logic may be latched at startup in a disabled mode by the firmware, determined by the customer mode stored in a one time programmable memory. The customer mode may be re-checked utilizing the firmware, and may disallow the use of code other than trusted code in the reprogrammable system when the re-checking fails.

Abstract translation: 公开了用于保护安全可重新编程系统中的客户秘密的方法和系统，并且可以包括通过硬件逻辑和固件来控制对客户特定功能的访问。 固件可以包括可信代码，并且可以包括存储在非易失性存储器中的引导代码，其可以包括只读存储器或锁定的闪存。 可以在允许将由客户编写的代码下载到可重新编程系统之前通过可信代码来检查客户模式。 可以通过来自可信来源的命令来限制访问客户特定功能。 由存储在一次可编程存储器中的客户模式确定的固件可以在禁用模式下的硬件逻辑锁存硬件逻辑。 可以使用固件来重新检查客户模式，并且当重新检查失败时，可以不允许在可再编程系统中使用除可信代码之外的代码。

公开(公告)号：US08452987B2

公开(公告)日：2013-05-28

申请号：US11753474

申请日：2007-05-24

Applicant: Xuemin Chen ,  Andrew Dellow ,  Iue-Shuenn Chen ,  Stephane Rodgers

Inventor： Xuemin Chen ,  Andrew Dellow ,  Iue-Shuenn Chen ,  Stephane Rodgers

IPC: G06F11/30 ,  G06F12/14

CPC classification number: H04N21/4432 ,  G06F11/1433 ,  G06F21/572 ,  H04N21/4586 ,  H04N21/818

Abstract: Methods and systems for software security in a secure communication system are disclosed and may include verifying downloaded code in a reprogrammable system and reloading prestored unmodifiable first stage code upon failure. The prestored unmodifiable first stage code, which may comprise boot code for the reprogrammable system, may be stored in locked flash, and the downloaded software code may be stored in unlocked flash. The downloaded software code may be verified by comparing a signature of the downloaded code to a private key. A first sticky bit may be utilized to indicate a failure of the verification and a second sticky bit may be utilized to indicate passing of the verification and the use of the downloaded software code. Whether to reset the reprogrammable system and reload the prestored unmodifiable first stage code may be determined from within the reprogrammable system, which may comprise a set-top box.

Abstract translation: 公开了用于安全通信系统中的软件安全性的方法和系统，并且可以包括验证可再编程系统中的下载代码，并且在故障时重新加载预先存储的不可修改的第一级代码。 预先存储的不可修改的第一级代码（其可以包括用于可重新编程系统的引导代码）可以存储在锁定的闪存中，并且下载的软件代码可以存储在解锁的闪存中。 可以通过将下载的代码的签名与私钥进行比较来验证下载的软件代码。 可以使用第一粘性位来指示验证失败，并且可以利用第二粘性位来指示验证的传递和下载的软件代码的使用。 是否重置可编程系统并重新加载预先存储的不可修改的第一级代码可以在可重编程系统内确定，其可以包括机顶盒。

公开(公告)号：US08417931B2

公开(公告)日：2013-04-09

申请号：US13034176

申请日：2011-02-24

Applicant: Stephane Rodgers ,  Andrew Dellow ,  Xuemin Chen ,  Iue-Shuenn Chen ,  Qiang Ye

Inventor： Stephane Rodgers ,  Andrew Dellow ,  Xuemin Chen ,  Iue-Shuenn Chen ,  Qiang Ye

IPC: G06F9/00 ,  H04L9/00

CPC classification number: G06F21/575 ,  G06F21/572

Abstract: A boot code may be segmented to allow separate and independent storage of the code segments in a manner that may enable secure system boot by autonomous fetching and assembling of the boot code by a security sub-system. The code fetching may need to be done without the main CPU running on the chip for security reasons. Because the boot code may be stored in memory devices that require special software application to account for non-contiguous storage of data and/or code, for example a NAND flash memory which would require such an application as Bad Block Management, code segments stored in areas guaranteed to be usable may enable loading remaining segment separately and independently. Each of the code segments may be validated, wherein validation of the code segments may comprise use of hardware-based signatures.

Abstract translation: 引导代码可以被分段以允许以可以通过安全子系统自主地取出和组合引导代码来实现安全系统引导的方式来分离和独立地存储代码段。 出于安全考虑，代码获取可能需要完成，而主CPU不会在芯片上运行。 由于引导代码可能存储在需要特殊软件应用程序的存储器件中以解决数据和/或代码的不连续存储，例如将要求诸如坏块管理的应用的NAND闪存，存储在 保证可用的区域可以分开和独立地加载剩余段。 可以验证每个代码段，其中代码段的验证可以包括使用基于硬件的签名。

公开(公告)号：US08380993B2

公开(公告)日：2013-02-19

申请号：US11952772

申请日：2007-12-07

Applicant: Xuemin Chen ,  Stephane Rodgers

Inventor： Xuemin Chen ,  Stephane Rodgers

IPC: H04L9/32 ,  H04N7/167

CPC classification number: H04H20/31 ,  G06T1/0021 ,  H04H2201/50 ,  H04N5/4401 ,  H04N19/44 ,  H04N19/467 ,  H04N21/23892 ,  H04N21/43853 ,  H04N21/8358

Abstract: Methods and systems for robust watermark insertion and extraction for digital set-top boxes are disclosed and may include descrambling, detecting watermarking messages in a received video signal utilizing a watermark message parser, and immediately watermarking the descrambled video signal utilizing an embedded CPU. The embedded CPU may utilize code that may be signed by an authorized key, encrypted externally to the chip, decrypted, and stored in memory in a region off-limits to other processors. The video signal may be watermarked in a decompressed domain. The enabling of the watermarking may be verified utilizing a watchdog timer. The descriptors corresponding to the watermarking may be stored in memory that may be inaccessible by the main CPU. The watermark may comprise unique identifier data specific to the chip and a time stamp, and may be encrypted utilizing an on-chip combinatorial function.

Abstract translation: 公开了用于数字机顶盒的鲁棒水印插入和提取的方法和系统，并且可以包括解扰，利用水印消息解析器检测接收到的视频信号中的水印消息，并立即利用嵌入式CPU对解扰的视频信号进行加水印。 嵌入式CPU可以利用可以通过授权密钥进行签名的代码，在芯片外部加密，解密并存储在与其他处理器不同的区域的存储器中。 视频信号可以在解压缩域中加水印。 可以使用看门狗定时器来验证水印的使能。 与水印相对应的描述符可以存储在主CPU可能无法访问的存储器中。 水印可以包括专用于芯片的唯一标识符数据和时间标记，并且可以使用片上组合功能进行加密。