公开(公告)号：US07421081B2

公开(公告)日：2008-09-02

申请号：US10825913

申请日：2004-04-16

申请人： Jian Zhang ,  Ling Shao ,  Yun Zhang Pei ,  Dong Xie

发明人： Jian Zhang ,  Ling Shao ,  Yun Zhang Pei ,  Dong Xie

IPC分类号： H04L9/08 ,  G09B3/00 ,  G09B7/00

CPC分类号： G06F21/10

摘要： A method for generating hierarchical keys of digital assets, the digital assets are arranged as at least one tree structure for management, a root node of the tree structure represents the complete set of the digital assets, other group nodes represents sub-sets in each level of the digital assets respectively, and the nodes in the lowest level are leaf nodes, said method includes: generating the key of the root node; and starting with the key of the root node, using the key of a father node to compute level by level the keys of its child nodes according to a predetermined function, through to leaf nodes.

摘要翻译： 一种生成数字资产分级密钥的方法，将数字资产排列为至少一种用于管理的树结构，树结构的根节点表示数字资产的完整集合，其他组节点表示每个级别的子集 的数字资源，最下层的节点是叶节点，所述方法包括：生成根节点的密钥; 并从根节点的密钥开始，使用父节点的密钥根据预定功能逐级计算其子节点的密钥逐级到叶节点。

公开(公告)号：US07373653B2

公开(公告)日：2008-05-13

申请号：US10726835

申请日：2003-12-03

申请人： Yun Zhang Pei ,  Ling Shao ,  Dong Xie

发明人： Yun Zhang Pei ,  Ling Shao ,  Dong Xie

IPC分类号： H04N7/173

CPC分类号： H04N21/26616 ,  H04N7/17336 ,  H04N21/2408 ,  H04N21/47202 ,  H04N21/6125

摘要： A channel merging method for a VOD system, said method comprises the steps of: in response to requests from a plurality of clients for a video program, establishing a root channel (S1) and at least one sub-channel (S11), said root channel (S1) being established according to a request from a client that makes the earliest request, each of said sub-channels (S11) being established in response to a request from a client that makes a later request; and monitoring variation of the number of the clients that are using each of said established channels, and maintaining the channel if the number of the clients using the monitored channel is not zero, and closing the channel if the number of the clients using the monitored channel becomes zero.

摘要翻译： 一种用于VOD系统的信道合并方法，所述方法包括以下步骤：响应于来自多个客户端的用于视频节目的请求，建立根信道（S 1）和至少一个子信道（S 11）， 所述根信道（S 1）根据来自客户端的请求建立，所述请求是进行最早请求的，每个所述子信道（S 11）响应于来自客户端的请求而建立; 以及监视正在使用每个所述建立的信道的客户端的数量的变化，以及如果使用所监视的信道的客户端的数量不为零则维护该信道，以及如果使用所监视的信道的客户端的数量，则关闭该信道 变成零。

公开(公告)号：US07673318B2

公开(公告)日：2010-03-02

申请号：US11924324

申请日：2007-10-25

申请人： Yun Zhang Pei ,  Ling Shao ,  Dong Xie

发明人： Yun Zhang Pei ,  Ling Shao ,  Dong Xie

IPC分类号： H04N7/173

CPC分类号： H04N21/26616 ,  H04N7/17336 ,  H04N21/2408 ,  H04N21/47202 ,  H04N21/6125

摘要： A channel merging method for a VOD system, said method comprises the steps of: in response to requests from a plurality of clients for a video program, establishing a root channel (S1) and at least one sub-channel (S11), said root channel (S1) being established according to a request from a client that makes the earliest request, each of said sub-channels (S11) being established in response to a request from a client that makes a later request; and monitoring variation of the number of the clients that are using each of said established channels, and maintaining the channel if the number of the clients using the monitored channel is not zero, and closing the channel if the number of the clients using the monitored channel becomes zero.

摘要翻译： 一种用于VOD系统的信道合并方法，所述方法包括以下步骤：响应多个客户端对视频节目的请求，建立根信道（S1）和至少一个子信道（S11），所述根 信道（S1）根据来自最早请求的客户端的请求被建立，每个所述子信道（S11）响应于来自客户端的稍后请求的请求被建立; 以及监视正在使用每个所述建立的信道的客户端的数量的变化，以及如果使用所监视的信道的客户端的数量不为零，则维持该信道，并且如果使用所监视的信道的客户端的数量，则关闭该信道 变成零。

公开(公告)号：US20090190763A1

公开(公告)日：2009-07-30

申请号：US12418938

申请日：2009-04-06

申请人： Jian Zhang ,  Ling Shao ,  Dong Xie

发明人： Jian Zhang ,  Ling Shao ,  Dong Xie

IPC分类号： H04L9/06 ,  G06F21/00

CPC分类号： G06F21/10

摘要： Multi-key content processing systems and methods, for processing content with at least one distribution target position. Each of the distribution target positions corresponds to an authorization key. An example method includes the steps of: encrypting said content with a content key; forming a key link based on said content key and the authorization key of said at least one distribution target position; and attaching said key link to the encrypted content.

摘要翻译： 多键内容处理系统和方法，用于处理具有至少一个分发目标位置的内容。 分配目标位置中的每一个对应于授权密钥。 一种示例性方法包括以下步骤：用内容密钥加密所述内容; 基于所述内容密钥和所述至少一个分发目标位置的授权密钥形成密钥链路; 以及将所述密钥链接附加到加密的内容。

公开(公告)号：US08139769B2

公开(公告)日：2012-03-20

申请号：US12418938

申请日：2009-04-06

申请人： Jian Zhang ,  Ling Shao ,  Dong Xie

发明人： Jian Zhang ,  Ling Shao ,  Dong Xie

IPC分类号： H04L9/00

CPC分类号： G06F21/10

摘要： Multi-key content processing systems and methods, for processing content with at least one distribution target position. Each of the distribution target positions corresponds to an authorization key. An example method includes the steps of: encrypting said content with a content key; forming a key link based on said content key and the authorization key of said at least one distribution target position; and attaching said key link to the encrypted content.

摘要翻译： 多键内容处理系统和方法，用于处理具有至少一个分发目标位置的内容。 分配目标位置中的每一个对应于授权密钥。 一种示例性方法包括以下步骤：用内容密钥加密所述内容; 基于所述内容密钥和所述至少一个分发目标位置的授权密钥形成密钥链路; 以及将所述密钥链接附加到加密的内容。

公开(公告)号：US07296159B2

公开(公告)日：2007-11-13

申请号：US10667841

申请日：2003-09-22

申请人： Jian Zhang ,  Zong Wei Liu ,  Ling Shao ,  Dong Xie

发明人： Jian Zhang ,  Zong Wei Liu ,  Ling Shao ,  Dong Xie

IPC分类号： G06F1/24

CPC分类号： H04N21/26606 ,  H04L9/0822 ,  H04L9/0836 ,  H04L9/0891 ,  H04N7/163 ,  H04N21/25808 ,  H04N21/63345 ,  H04N21/6405

摘要： Methods and apparatus for key distribution in a conditional access system, assuming that the set of all user nodes which the system can accommodate is a complete set, and a subset is composed of all user nodes or part of user nodes. One method comprises: decomposing said subset into at least one secondary subset; assigning a different user key to each secondary subset, each said user key being transmitted to all users in a corresponding secondary subset; encrypting an entitlement key by using each said user key so as to generate a cipher text corresponding to each said secondary subset; and combining said cipher text to generate a media key control block and transmitting said media key control block to all users in said subset. Since a classification method of a binary tree and a multiple tree is used, the invention can save a lot of network resources.

摘要翻译： 在条件访问系统中密钥分发的方法和装置，假设系统可以容纳的所有用户节点的集合是完整集合，并且子集由所有用户节点或部分用户节点组成。 一种方法包括：将所述子集分解成至少一个次级子集; 将不同的用户密钥分配给每个次要子集，每个所述用户密钥被发送到对应次要子集中的所有用户; 通过使用每个所述用户密钥来加密授权密钥，以便生成对应于每个所述次要子集的密文; 以及组合所述密文以产生媒体密钥控制块，并将所述媒体密钥控制块发送到所述子集中的所有用户。 由于使用二叉树和多树的分类方法，本发明可以节省大量的网络资源。

公开(公告)号：US20050209967A1

公开(公告)日：2005-09-22

申请号：US11082714

申请日：2005-03-17

申请人： Jian Zhang ,  Ling Shao ,  Dong Xie

发明人： Jian Zhang ,  Ling Shao ,  Dong Xie

IPC分类号： G06F21/00 ,  H04L9/14 ,  G06F17/60

CPC分类号： G06F21/10

摘要： This invention provides multi-key content processing systems and methods, for processing content with at least one distribution target position. Each of the distribution target positions corresponds to an authorization key. An example method includes the steps of: encrypting said content with a content key; forming a key link based on said content key and the authorization key of said at least one distribution target position; and attaching said key link to the encrypted content.

摘要翻译： 本发明提供了用于处理具有至少一个分发目标位置的内容的多键内容处理系统和方法。 分配目标位置中的每一个对应于授权密钥。 一种示例性方法包括以下步骤：用内容密钥加密所述内容; 基于所述内容密钥和所述至少一个分发目标位置的授权密钥形成密钥链路; 以及将所述密钥链接附加到加密的内容。

公开(公告)号：US07890765B2

公开(公告)日：2011-02-15

申请号：US12123892

申请日：2008-05-20

申请人： Jian Zhang ,  Ling Shao ,  Dong Xie

发明人： Jian Zhang ,  Ling Shao ,  Dong Xie

IPC分类号： H04L9/32

CPC分类号： H04L63/12 ,  G06F21/645 ,  G06F21/725 ,  G06F2221/2151

摘要： Methods, apparatus and systems for generating a trusted digital time stamp as well as a public time source. It includes, an apparatus for receiving and recording public time information and a method for verifying a digital time stamp. A method for generating a trusted digital time stamp includes: obtaining a first time information and a corresponding random code from a public time source; and generating a digital time stamp using a first time information and random code. A method for verifying a digital time stamp includes: recording time information and corresponding random codes transmitted by a public time source; retrieving time information and a random code contained in the time stamp; and comparing a retrieved random code from the time stamp with one of the recorded random codes that corresponds to a time information in the time stamp, if they are consistent, the time stamp is determined to be trusted, otherwise the time stamp is determined to be not trusted.

摘要翻译： 用于生成可信数字时间戳以及公共时间源的方法，装置和系统。 它包括用于接收和记录公共时间信息的装置和用于验证数字时间戳的方法。 一种用于生成可信数字时间戳的方法包括：从公共时间源获得第一时间信息和相应的随机码; 以及使用第一时间信息和随机码产生数字时间戳。 一种用于验证数字时间戳的方法包括：记录由公共时间源发送的时间信息和相应的随机码; 检索时间信息和时间戳中包含的随机代码; 并且将来自时间戳的检索到的随机码与对应于时间标记中的时间信息的记录随机码之一进行比较，如果它们一致，则确定时间戳是可信的，否则时间戳被确定为 不信任

公开(公告)号：US07516332B2

公开(公告)日：2009-04-07

申请号：US11082714

申请日：2005-03-17

申请人： Jian Zhang ,  Ling Shao ,  Dong Xie

发明人： Jian Zhang ,  Ling Shao ,  Dong Xie

IPC分类号： H04L9/00

CPC分类号： G06F21/10

摘要： This invention provides multi-key content processing systems and methods, for processing content with at least one distribution target position. Each of the distribution target positions corresponds to an authorization key. An example method includes the steps of: encrypting said content with a content key; forming a key link based on said content key and the authorization key of said at least one distribution target position; and attaching said key link to the encrypted content.

摘要翻译： 本发明提供了用于处理具有至少一个分发目标位置的内容的多键内容处理系统和方法。 分配目标位置中的每一个对应于授权密钥。 一种示例性方法包括以下步骤：用内容密钥加密所述内容; 基于所述内容密钥和所述至少一个分发目标位置的授权密钥形成密钥链路; 以及将所述密钥链接附加到加密的内容。

公开(公告)号：US20080288779A1

公开(公告)日：2008-11-20

申请号：US12123892

申请日：2008-05-20

申请人： Jian Zhang ,  Ling Shao ,  Dong Xie

发明人： Jian Zhang ,  Ling Shao ,  Dong Xie

IPC分类号： H04L9/00

CPC分类号： H04L63/12 ,  G06F21/645 ,  G06F21/725 ,  G06F2221/2151

摘要： Methods, apparatus and systems for generating a trusted digital time stamp as well as a public time source. It includes, an apparatus for receiving and recording public time information and a method for verifying a digital time stamp. A method for generating a trusted digital time stamp includes: obtaining a first time information and a corresponding random code from a public time source; and generating a digital time stamp using a first time information and random code. A method for verifying a digital time stamp includes: recording time information and corresponding random codes transmitted by a public time source; retrieving time information and a random code contained in the time stamp; and comparing a retrieved random code from the time stamp with one of the recorded random codes that corresponds to a time information in the time stamp, if they are consistent, the time stamp is determined to be trusted, otherwise the time stamp is determined to be not trusted.

摘要翻译： 用于生成可信数字时间戳以及公共时间源的方法，装置和系统。 它包括用于接收和记录公共时间信息的装置和用于验证数字时间戳的方法。 一种用于生成可信数字时间戳的方法包括：从公共时间源获得第一时间信息和相应的随机码; 以及使用第一时间信息和随机码产生数字时间戳。 一种用于验证数字时间戳的方法包括：记录由公共时间源发送的时间信息和相应的随机码; 检索时间信息和时间戳中包含的随机代码; 并且将来自时间戳的检索到的随机码与对应于时间标记中的时间信息的记录随机码之一进行比较，如果它们一致，则确定时间戳是可信的，否则时间戳被确定为 不信任