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1. 发明授权

US08571209B2 Recording keys in a broadcast-encryption-based system 有权
标题翻译：在基于广播加密的系统中记录密钥
公开(公告)号：US08571209B2
公开(公告)日：2013-10-29
申请号：US12356067
申请日：2009-01-19
申请人： Thomas Alexander Bellwood , Robert Glenn Deen , Hongxia Jin , Jeffrey Bruce Lotspiech , Sigfredo Ismael Nin , Matthew Francis Rutkowski
发明人： Thomas Alexander Bellwood , Robert Glenn Deen , Hongxia Jin , Jeffrey Bruce Lotspiech , Sigfredo Ismael Nin , Matthew Francis Rutkowski
IPC分类号： H04L9/06
CPC分类号： H04L9/0822 , H04L9/16 , H04L63/06 , H04L2209/60 , H04L2209/606 , H04L2463/062 , H04N7/1675 , H04N21/2541 , H04N21/4334 , H04N21/4408 , H04N21/4627 , H04N21/63345
摘要： Embodiments of the invention relate to obtaining forensic information for an anonymous attack of digital content without variations in a broadcast encryption system. In one embodiment a media device, being configured to record digital content on recordable media, receives digital content, a unified media key block, and a recording key table. The device calculates a set of recording keys from the recording key table using a media key variant from the unified media key block. The device then generates a title key and encrypts by the digital content in the generated title key. The device then encrypts the generated title key in each one of the calculated recording keys, adds a header including the encrypted titles keys to the encrypted digital content, and stores the encrypted digital content with the header on recordable media.
摘要翻译：本发明的实施例涉及获得无广播加密系统中的变化的数字内容的匿名攻击的取证信息。在一个实施例中，被配置为在可记录介质上记录数字内容的媒体设备接收数字内容，统一媒体密钥块和记录密钥表。该设备使用来自统一媒体密钥块的媒体密钥变体从记录密钥表计算一组记录密钥。然后，该设备生成标题密钥，并通过生成的标题密钥中的数字内容进行加密。然后，该设备对所计算的记录密钥中的每一个加密生成的标题密钥，将包括加密的标题密钥的标题添加到加密的数字内容，并将具有标题的加密的数字内容存储在可记录介质上。

2. 发明申请

US20100183148A1 RECORDING KEYS IN A BROADCAST-ENCRYPTION-BASED SYSTEM 有权
标题翻译：基于加密加密的系统中的记录卡
公开(公告)号：US20100183148A1
公开(公告)日：2010-07-22
申请号：US12356067
申请日：2009-01-19
申请人： Thomas Alexander Bellwood , Robert Glen Deen , Hongxia Jin , Jeffrey Bruce Lotspiech , Sigfredo Ismael Nin , Matthew Francis Rutkowski
发明人： Thomas Alexander Bellwood , Robert Glen Deen , Hongxia Jin , Jeffrey Bruce Lotspiech , Sigfredo Ismael Nin , Matthew Francis Rutkowski
IPC分类号： H04L9/06
CPC分类号： H04L9/0822 , H04L9/16 , H04L63/06 , H04L2209/60 , H04L2209/606 , H04L2463/062 , H04N7/1675 , H04N21/2541 , H04N21/4334 , H04N21/4408 , H04N21/4627 , H04N21/63345
摘要： According to one embodiment of the present invention, a method for protecting content in a broadcast-encryption-based system, where the devices in the system receive a recording key table. Each device generates a set of recording keys from the recording key table using a media key variant calculated from the broadcast encryption system's media key block. The digital content is encrypted in a title key picked by the recorder. The selected title key is also encrypted in each one of the recorder's generated recording keys. To play back the content, a player uses one of its generated recording keys to decrypt the title key and the decrypt the content. The recording key table is designed so that any two devices are guaranteed to have at least one key in common during normal operation, although during a forensic situation, this rule can be abandoned.
摘要翻译：根据本发明的一个实施例，一种用于保护基于广播加密的系统中的内容的方法，其中系统中的设备接收记录密钥表。每个设备使用从广播加密系统的媒体密钥块计算的媒体密钥变体从记录密钥表生成一组记录密钥。数字内容以记录器拾取的标题密钥加密。所选择的标题密钥也在记录器生成的记录密钥中的每一个中被加密。要播放内容，播放器使用其生成的记录密钥之一来解密标题密钥并对内容进行解密。记录键表被设计成使得任何两个装置在正常操作期间被保证具有至少一个共同的钥匙，尽管在取证情况下，该规则可以被放弃。

3. 发明授权

US09520993B2 Renewable traitor tracing 有权
标题翻译：可再生叛逆者追踪
公开(公告)号：US09520993B2
公开(公告)日：2016-12-13
申请号：US11230022
申请日：2005-09-19
申请人： Hongxia Jin , Jeffrey Bruce Lotspiech , Sigfredo Ismael Nin
发明人： Hongxia Jin , Jeffrey Bruce Lotspiech , Sigfredo Ismael Nin
IPC分类号： G06Q20/00 , H04L9/08
CPC分类号： H04L9/3268 , H04L9/083 , H04L9/0891 , H04L9/3247 , H04L63/061 , H04L2209/601 , H04L2209/606
摘要： The present invention provides a method performed on a computer of preventing re-use of compromised keys in a broadcast encryption system. In an exemplary embodiment, the method includes (1) incorporating a particular set of Sequence Keys assigned by a license agency into individual receivers, (2) assigning a Sequence Key Block (SKB) by the license agency to at least one distributed protected file, (3) performing incremental cryptographic testing by the individual receivers to determine if a selected Sequence Key from the set of Sequence Keys is compromised, (4) if the selected Sequence Key is not compromised, decrypting the file, and (5) if the selected Sequence Key is compromised and if a subsequent Sequence Key from the set of Sequence Keys is available, selecting the subsequent Sequence Key.
摘要翻译：本发明提供一种在计算机上执行的防止在广播加密系统中重复使用受损密钥的方法。在一个示例性实施例中，该方法包括（1）将由许可证代理机构分配的特定的一组序列密钥合并到单独的接收机中，（2）将许可代理机构的序列密钥块（SKB）分配给至少一个分布式受保护文件，（3）执行各个接收机的增量密码测试，以确定序列密钥集合中所选择的序列密钥是否受到损害，（4）如果所选择的序列密钥不受影响，解密该文件，以及（5）如果选定的序列密钥被破坏，并且如果序列密钥集合中的后续序列密钥可用，则选择随后的序列密钥。

4. 发明授权

US08391481B2 Rebinding of content title keys in clusters of devices with distinct security levels 有权
标题翻译：在具有不同安全级别的设备群集中重新绑定内容标题密钥
公开(公告)号：US08391481B2
公开(公告)日：2013-03-05
申请号：US12651382
申请日：2009-12-31
申请人： Robert Glenn Deen , Hongxia Jin , Sigfredo Ismael Nin , Dulce B. Ponceleon
发明人： Robert Glenn Deen , Hongxia Jin , Sigfredo Ismael Nin , Dulce B. Ponceleon
IPC分类号： H04L29/06
CPC分类号： H04L9/0836 , H04L9/0891 , H04L2209/601
摘要： According to one embodiment of the present invention, a system, method, and computer program product is provided for rebinding title keys in clusters of devices with distinct security levels in broadcast encryption systems. The method includes receiving a new management key and unbinding an encrypted title key with a previously used management key, the title key having a security class and residing in a title key block for a device having a security class, the device being in a cluster of devices including devices having a plurality of security classes. If the device security class is lower that the title key security class, the unbound title key is partially rebound with the new management key. the partially rebound title key is then saved in the title key block for the device.
摘要翻译：根据本发明的一个实施例，提供了一种系统，方法和计算机程序产品，用于在广播加密系统中具有不同安全级别的设备群中重新标识标题密钥。所述方法包括：接收新的管理密钥，并将加密的标题密钥与先前使用的管理密钥解除绑定，所述标题密钥具有安全级别，并且驻留在具有安全等级的设备的标题密钥块中，所述设备处于设备包括具有多个安全等级的设备。如果设备安全级别低于标题密钥安全级别，则使用新的管理密钥部分地弹出未绑定的标题密钥。然后将部分反弹的标题密钥保存在设备的标题密钥块中。

5. 发明申请

US20110158404A1 REBINDING OF CONTENT TITLE KEYS IN CLUSTERS OF DEVICES WITH DISTINCT SECURITY LEVELS 有权
标题翻译：在具有不同安全级别的设备集群中重新配置内容标签
公开(公告)号：US20110158404A1
公开(公告)日：2011-06-30
申请号：US12651382
申请日：2009-12-31
申请人： Robert Glenn Deen , Hongxia Jin , Sigfredo Ismael Nin , Dulce B. Ponceleon
发明人： Robert Glenn Deen , Hongxia Jin , Sigfredo Ismael Nin , Dulce B. Ponceleon
IPC分类号： H04L9/00
CPC分类号： H04L9/0836 , H04L9/0891 , H04L2209/601
摘要： According to one embodiment of the present invention, a system, method, and computer program product is provided for rebinding title keys in clusters of devices with distinct security levels in broadcast encryption systems. The method includes receiving a new management key and unbinding an encrypted title key with a previously used management key, the title key having a security class and residing in a title key block for a device having a security class, the device being in a cluster of devices including devices having a plurality of security classes. If the device security class is lower that the title key security class, the unbound title key is partially rebound with the new management key. the partially rebound title key is then saved in the title key block for the device.
摘要翻译：根据本发明的一个实施例，提供了一种系统，方法和计算机程序产品，用于在广播加密系统中具有不同安全级别的设备群中重新标识标题密钥。所述方法包括：接收新的管理密钥，并将加密的标题密钥与先前使用的管理密钥解除绑定，所述标题密钥具有安全级别，并且驻留在具有安全等级的设备的标题密钥块中，所述设备处于设备包括具有多个安全等级的设备。如果设备安全级别低于标题密钥安全级别，则使用新的管理密钥部分地弹出未绑定的标题密钥。然后将部分反弹的标题密钥保存在设备的标题密钥块中。

6. 发明申请

US20090214031A1 UNIFIED BROADCAST ENCRYPTION SYSTEM 有权
标题翻译：统一广播加密系统
公开(公告)号：US20090214031A1
公开(公告)日：2009-08-27
申请号：US12038773
申请日：2008-02-27
申请人： Hongxia Jin , Jeffrey Bruce Lotspiech
发明人： Hongxia Jin , Jeffrey Bruce Lotspiech
IPC分类号： H04N7/167 , H04L9/00
CPC分类号： H04L9/0836 , G09C5/00 , H04L2209/606
摘要： A system and method is disclosed for performing unified broadcast encryption and traitor tracing for digital content. In one embodiment a media key tree is divided into S subtrees, the media key tree including media keys and initial values, which may be random values. The digital content is divided into a plurality of segments and at least some of the segments are converted into a plurality of variations. The random values are transformed into media key variations and a separate media key variant is assigned to each of the subdivided subtrees. A unified media key block including the media key tree is stored on the media.
摘要翻译：公开了一种用于对数字内容进行统一广播加密和叛逆追踪的系统和方法。在一个实施例中，媒体密钥树被划分为S子树，媒体密钥树包括媒体密钥和初始值，其可以是随机值。数字内容被分成多个段，并且至少一些段转换成多个变体。将随机值转换为媒体密钥变体，并将分离的媒体密钥变体分配给每个细分子树。包含媒体密钥树的统一媒体密钥块被存储在媒体上。

7. 发明授权

US07505593B2 Method for tracing traitors and preventing piracy of digital content in a broadcast encryption system 失效
标题翻译：在广播加密系统中跟踪叛逃者和防止盗版数字内容的方法
公开(公告)号：US07505593B2
公开(公告)日：2009-03-17
申请号：US10315395
申请日：2002-12-09
申请人： Hongxia Jin , Jeffrey Bruce Lotspiech
发明人： Hongxia Jin , Jeffrey Bruce Lotspiech
IPC分类号： H04N7/167
CPC分类号： G09C5/00 , G11B20/00086 , G11B20/00173 , G11B20/0021 , G11B20/00224 , G11B20/00507 , G11B20/00884 , H04L9/0833 , H04L9/0891 , H04L63/0428 , H04L2209/606 , H04L2463/101 , H04N7/165 , H04N21/2585
摘要： A method for disabling a traitor receiver in a broadcast encryption system includes examining augmentations of at least one redistributed version of a file in a group of files, wherein each authorized receiver acquired decryption keys only for the particular augmentations that it used. A level to which the augmentations correspond to a first set of super codes previously assigned to each authorized receiver is determined. A conclusion is drawn regarding the number of receivers that are traitor receivers. The receivers concluded to be traitor are selectively revoked. The process is repeated by selecting another set of super codes; selected to reduce the number of authorized receivers concluded to be traitor receivers. The sets of super codes are selected such that the number is made larger to achieve quicker revocation of a traitor receiver at the cost of increasing chance of an incorrect revocation of an innocent receiver.
摘要翻译：一种用于在广播加密系统中禁用叛徒接收机的方法包括：检查一组文件中的文件的至少一个重新分发版本的扩充，其中每个授权的接收方仅为其所使用的特定扩充获取解密密钥。确定增加对应于先前分配给每个授权接收机的第一组超级代码的级别。得出关于作为叛徒接收机的接收机的数量的结论。被认定为叛徒的接收者被选择性地撤销。通过选择另一组超级代码重复该过程; 选择减少被认定为叛国接收者的授权接收机的数量。选择这些超级代码，使得数字更大以便以增加无辜接收者的不正确撤销的机会为代价来更快地撤销叛徒接收者。

8. 发明申请

US20090049308A1 Method for Effective Tamper Resistance 有权
标题翻译：有效篡改电阻的方法
公开(公告)号：US20090049308A1
公开(公告)日：2009-02-19
申请号：US12135052
申请日：2008-06-06
申请人： Hongxia Jin , Jeffrey Bruce Lotspiech , Ginger M. Myles
发明人： Hongxia Jin , Jeffrey Bruce Lotspiech , Ginger M. Myles
IPC分类号： H04L9/06
CPC分类号： G06F21/14
摘要： A system, method, and computer program product for preventing a malicious user from analyzing and modifying software content. The one-way functions used in prior art systems using dynamically evolving audit logs or self-modifying applications are replaced with a one-way function based on group theory. With this modification, untampered key evolution will occur inside a defined mathematical group such that all valid key values form a subgroup. However, if the program is altered, the key will evolve incorrectly and will no longer be a member of the subgroup. Once the key value is outside of the subgroup, it is not possible to return it to the subgroup. The present invention provides a limited total number of valid keys. The key evolution points are not restricted to locations along the deterministic path, so the key can be used in various novel ways to regulate the program's behavior, including in non-deterministic execution paths.
摘要翻译：一种用于防止恶意用户分析和修改软件内容的系统，方法和计算机程序产品。使用动态演进的审计日志或自修改应用程序的现有技术系统中使用的单向函数被基于组理论的单向函数所取代。通过这种修改，无限制的密钥演进将发生在定义的数学组内，使得所有有效的密钥值形成一个子组。但是，如果程序被更改，则密钥将不正确地发展，不再是该子组的成员。一旦键值超出了子组，就不可能将其返回到子组。本发明提供了有限的总数量的有效密钥。关键演化点不仅限于确定路径上的位置，所以密钥可以以各种新颖的方式用于调节程序的行为，包括在非确定性执行路径中。

9. 发明申请

US20080137864A1 System, Method, and Service for Tracing Traitors from Content Protection Circumvention Devices 有权
标题翻译：从内容保护设备追踪叛徒的系统，方法和服务
公开(公告)号：US20080137864A1
公开(公告)日：2008-06-12
申请号：US11608268
申请日：2006-12-08
申请人： Hongxia Jin , Jeffrey Bruce Lotspiech , Philip Anastasios Zigoris
发明人： Hongxia Jin , Jeffrey Bruce Lotspiech , Philip Anastasios Zigoris
IPC分类号： H04L9/16 , G06F17/50
CPC分类号： H04L9/32 , G09C5/00 , H04L9/0891 , H04L2209/606
摘要： A traitor tracing system generates a hypothesized model of the circumvention device that models a hypothesized set of device keys compromised by the circumvention device. The system iteratively invokes a subset tracing system to identify a compromised device key until substantially all the compromised device keys in the set of compromised device keys are identified so as to disable the circumvention device. A subset tracing system generates a circumvention device model that models behavior of a circumvention device using prior knowledge and The system iteratively selects and applies to the circumvention device a test based on the hypothesized model and the circumvention device model and receives a response from the circumvention device indicating a success of the test in playing protected content on the circumvention device. The system updates the hypothesized model using the received response, the selected test, a current version of the hypothesized model, and a current version of the circumvention device model to focus the test selecting process in determining the device keys obtained from the traitor.
摘要翻译：叛逆者追踪系统产生对避开装置的假设模型，以模拟被规避装置损害的假设的一组装置钥匙。系统迭代地调用子集跟踪系统以识别受损的设备密钥，直到被识别的设备密钥集中的基本上所有受损设备密钥被识别为禁用规避设备。子集跟踪系统生成规避设备模型，其使用先验知识对规避设备的行为进行建模，并且系统基于假设模型和规避设备模型迭代地选择并应用到规避设备的测试，并且接收来自规避设备的响应表明在规避设备上播放受保护内容的测试成功。系统使用接收到的响应，所选择的测试，假设模型的当前版本和规避设备模型的当前版本来更新假设模型，以将测试选择过程集中在确定从叛徒获得的设备密钥。

10. 发明授权

US09712321B2 Unified broadcast encryption system 有权
公开(公告)号：US09712321B2
公开(公告)日：2017-07-18
申请号：US12131076
申请日：2008-05-31
申请人： Hongxia Jin , Jeffrey Bruce Lotspiech
发明人： Hongxia Jin , Jeffrey Bruce Lotspiech
IPC分类号： H04L9/00 , H04L9/08 , G09C5/00
CPC分类号： H04L9/0836 , G09C5/00 , H04L2209/606
摘要： A system and method is disclosed for performing unified broadcast encryption and traitor tracing for digital content. In one embodiment a media key tree is divided into S subtrees, the media key tree including media keys and initial values, which may be random values. The digital content is divided into a plurality of segments and at least some of the segments are converted into a plurality of variations. The random values are transformed into media key variations and a separate media key variant is assigned to each of the subdivided subtrees. A unified media key block including the media key tree is stored on the media.

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