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公开(公告)号：US07523307B2
公开(公告)日：2009-04-21
申请号：US10042652
申请日：2002-01-08
CPC分类号： H04L63/0428 , G11B20/0021 , H04L9/0836 , H04L9/0891 , H04L12/18 , H04L2209/605 , H04L2209/606
摘要： A method for enforcing compliance in both the copy protect domain and service subscription domain for streamed multicast data. Each content is encrypted with a title key that itself is encrypted with a channel unique key which is a hash of a session key and a channel key. A compliant player is given the channel key upon registration for a subscription service (representing subscription protection) and is also given device keys upon activation (representing copy protection) for decrypting the session key. Consequently, the channel unique key can be obtained (and, hence, the content decrypted) only by a player that is compliant with both copy protection rules and subscription rules. The channel key can be refreshed periodically as subscriptions change or expire.
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公开(公告)号：US06888944B2
公开(公告)日：2005-05-03
申请号：US09777506
申请日：2001-02-05
IPC分类号： H04H20/00 , H04L9/00 , H04L9/08 , H04N7/16 , H04N7/167 , H04N21/258 , H04N21/266
CPC分类号： H04N7/163 , G11B20/00362 , H04L9/0861 , H04L9/14 , H04L2209/34 , H04L2209/606 , H04N7/1675 , H04N21/2585 , H04N21/26613
摘要： Sets of encryption keys useful by devices for decrypting encrypted content are defined using an error-correcting code such as a Reed-Solomon code to define vectors of length “n” over an alphabet of (0, . . . , N−1), wherein “n” is the number of columns in a key matrix and “N” is the number of rows in the matrix. Each vector represents a set of keys that can be assigned to a device. With this invention, overlap between sets of keys can be minimized to minimize the possibility that the key set of an innocent device might be inadvertently revoked when the key set of a compromised device is revoked. Also, only the generating matrix of the error-correcting code and the index of one set of keys need be stored in memory, since all previously defined key sets can be regenerated if need be from just the generating matrix and index.
摘要翻译： 使用诸如里德 - 所罗门码的纠错码来定义加密内容解密设备所使用的加密密钥集合，以在（0，...，N-1）的字母表上定义长度为“n”的向量， 其中“n”是键矩阵中的列数，“N”是矩阵中的行数。 每个向量表示可以分配给设备的一组密钥。 利用本发明，可以最小化密钥组之间的重叠，以最小化当被破坏的设备的密钥组被撤销时，无辜设备的密钥组可能被无意中撤销的可能性。 此外，只有纠错码的生成矩阵和一组密钥的索引需要存储在存储器中，因为如果需要仅来自生成矩阵和索引，则可以重新生成所有先前定义的密钥集。
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3.发明授权Coincidence-free media key block for content protection for recordable media 有权无记录媒体关键块，用于可记录媒体的内容保护公开(公告)号：US06883097B1
公开(公告)日：2005-04-19
申请号：US09575740
申请日：2000-05-22
IPC分类号： H04H20/00 , H04L9/00 , H04L9/08 , H04N7/16 , H04N7/167 , H04N21/258 , H04N21/266
CPC分类号： H04N7/163 , G11B20/00362 , H04L9/0861 , H04L9/14 , H04L2209/34 , H04L2209/606 , H04N7/1675 , H04N21/2585 , H04N21/26613
摘要： A system for protecting content on recordable media for, e.g., DVD audio disks, flash memory media, or other media includes providing a media key block (MKB) on each media, with each MKB including 25,000 encryptions of a media key by 25,000 or so device keys. Each authorized player in the system has a single device key from among the system device keys with which to decrypt the media key. To avoid a coincidence attack in which a hacker can learn the MKB and associated media key and then guess at a device key without knowing its position in the MKB, the media key is XORed with a number representing each position in the MKB, and only then encrypted with the device key corresponding to that position.
摘要翻译： 用于保护例如DVD音频盘，闪存介质或其他媒体的可记录媒体上的内容的系统包括在每个媒体上提供媒体密钥块（MKB），每个MKB包括25,000个媒体密钥的25,000个加密 设备密钥。 系统中的每个授权的播放器具有用于解密媒体密钥的系统设备密钥中的单个设备密钥。 为了避免黑客可以学习MKB和相关媒体密钥的巧合攻击，然后在不知道其在MKB中的位置的情况下猜测设备密钥，则将媒体密钥与表示MKB中每个位置的数字进行异或， 用与该位置对应的设备密钥加密。
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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。
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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。
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公开(公告)号：US09520993B2
公开(公告)日：2016-12-13
申请号：US11230022
申请日：2005-09-19
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。
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7.发明授权
公开(公告)号：US6137494A
公开(公告)日：2000-10-24
申请号：US929139
申请日：1997-09-05
申请人： Sigfredo Ismael Nin
发明人： Sigfredo Ismael Nin
CPC分类号： G06T3/4015 , G06T3/4007
摘要： A method of evaluating a tetrahedral linear interpolation function utilizes a table preparation process and a linear interpolating process. In the table preparation process, values v and domain points p of the function are related by two tetrahedral interpolation variables denoted as a matrix T and a vector t, as follows: v=t+pT. The coordinates of p include n components, and the value v includes m components. The matrix T includes n rows and m columns, as it must to relate p to v. If the value of the function is scalar, t is also a scalar, and T is a vector of n elements. From the coordinates of the (n+1) domain input points and the function values v at these points, the values of variables t and T are computed and stored in a table. The linear interpolation procedure of the invention uses the values tabulated for t and T to calculate an approximation for the components of the function value v at a given p. The function arguments are stored in a first array of n elements denoted as p[i], and the calculated approximations are to be stored in a second array of m elements denoted as v[j]. The approximations for the array v[j] may be calculated according to the following equation: ##EQU1##
摘要翻译： 评估四面体线性插值函数的方法利用表格准备过程和线性内插处理。 在表的准备过程中，函数的值v和域点p由表示为矩阵T和向量t的两个四面体内插变量相关，如下：v = t + pT。 p的坐标包括n个分量，并且值v包括m个分量。 矩阵T包括n行和m列，因为它必须将p与v相关联。如果函数的值是标量，则t也是标量，T是n个元素的向量。 从这些点处的（n + 1）域输入点的坐标和函数值v，计算变量t和T的值并将其存储在表中。 本发明的线性内插程序使用列表为t和T的值来计算在给定p处的函数值v的分量的近似。 函数参数存储在表示为p [i]的n个元素的第一个数组中，计算出的近似值将被存储在表示为v [j]的m个元素的第二个数组中。 阵列v [j]的近似可以根据以下等式计算：
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8.发明授权Function approximation using a centered cubic packing with tetragonal disphenoid extraction 失效函数近似使用中心立方填充与四方形去萃取
公开(公告)号：US5751926A
公开(公告)日：1998-05-12
申请号：US996306
申请日：1992-12-23
申请人： James Matthews Kasson , Sigfredo Ismael Nin , Wilfred Edmund Plouffe, Jr. , Duaine Wright Pryor, Jr.
发明人： James Matthews Kasson , Sigfredo Ismael Nin , Wilfred Edmund Plouffe, Jr. , Duaine Wright Pryor, Jr.
CPC分类号： G06F17/17 , H04N1/6022
摘要： The invention provides approximation of the value of a function of three variables. The invention embraces three processes: function domain packing, polyhedron extraction, and volumetric interpolation. The processes are applied to a mathematical function to calculate an approximation for the function range output value at a point which has been arbitrarily selected from the input domain of the function. Function domain packing utilizes two interlocked domain subdivisions. A first subdivision and a second subdivision each divide the domain space into rectangular solids. Each subdivision is accomplished by means of a plurality of planes of constant value corresponding to each of the input dimensions. After a function domain has been so subdivided, a tetrahedral volume is extracted from the fraction domain space. This tetrahedral volume is defined by two points from the first subdivision and two points from the second subdivision. The third process of the invention is a function approximation method using volumetric interpolation. If the fraction domain is subdivided according to the present invention, a continuous approximation of function range output values will result. The volumetric interpolation process commences by subdividing the extracted tetrahedron into four sub-tetrahedra. The subdivision is implemented by drawing lines from each of the vertices of the extracted tetrahedron to the target evaluation point to form four sub-tetrahedra.
摘要翻译： 本发明提供了三个变量的函数的值的近似。 本发明包括三个过程：功能领域包装，多面体提取和体积插值。 该过程被应用于数学函数以计算在从功能的输入域中任意选择的点处的功能范围输出值的近似。 功能域包装使用两个互锁域分部。 第一细分和第二细分每个将域空间分成矩形固体。 每个细分通过对应于每个输入尺寸的多个恒定值平面来实现。 在函数域被细分之后，从分数域空间中提取四面体体积。 这个四面体体积是由第一个细分的两个点和第二个细分的两个点定义的。 本发明的第三个过程是使用体积插值的函数近似方法。 如果根据本发明细分分数域，则将产生功能范围输出值的连续近似。 通过将提取的四面体细分为四个亚四面体开始体积插值过程。 通过将提取的四面体的每个顶点的线绘制到目标评估点来实现细分以形成四个子四面体。
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9.发明申请REBINDING OF CONTENT TITLE KEYS IN CLUSTERS OF DEVICES WITH DISTINCT SECURITY LEVELS 有权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
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。
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10.发明授权Rebinding of content title keys in clusters of devices with distinct security levels 有权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
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。
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