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1. 发明授权

US11728991B2 Privacy-preserving leakage-deterring public-key encryption from attribute-based encryptions 有权
公开(公告)号：US11728991B2
公开(公告)日：2023-08-15
申请号：US16423698
申请日：2019-05-28
申请人： International Business Machines Corporation
发明人： Jan L. Camenisch , Maria Dubovitskaya , Patrick Towa
IPC分类号： H04L9/32 , H04L9/08 , H04L9/06 , G06Q20/36 , H04L9/30 , H04L9/40 , H04L9/00
CPC分类号： H04L9/3218 , G06Q20/36 , H04L9/0618 , H04L9/0656 , H04L9/088 , H04L9/0825 , H04L9/0894 , H04L9/3073 , H04L9/3247 , H04L63/045 , H04L9/50 , H04L2209/56 , H04L2209/606
摘要： Privacy-preserving leakage-deterring public-key encryption techniques are provided. A sender system sends to an authority system a commitment to leakage-deterring-data, and proves in zero-knowledge that the sender system has access to an opening to the commitment. The sender system receives a signature corresponding to a signed commitment to the leakage-deterring-data and an identifier of the sender system. The sender system encrypts a message to a receiver system by applying a one-time pad to the message using a one-time-pad key, and encrypts the result of the application with the public key of the receiver system. The sender system encrypts the one-time-pad key with an attribute-based encryption scheme with a public key of an oblivious decryptor system. The sender system forms a ciphertext from a combination of the encrypted message and the encrypted one-time-pad key and sends the ciphertext to the receiver system.

2. 发明申请

US20170317822A1 Unified Broadcast Encryption System 有权
公开(公告)号：US20170317822A1
公开(公告)日：2017-11-02
申请号：US15650613
申请日：2017-07-14
申请人： INTERNATIONAL BUSINESS MACHINES CORPORATION
发明人： Hongxia Jin , Jeffrey B. Lotspiech
IPC分类号： 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.

3. 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.

4. 发明授权

US09576115B1 Computerized, copy detection and discrimination apparatus and method 有权
标题翻译：电脑化，复印检测及识别装置及方法
公开(公告)号：US09576115B1
公开(公告)日：2017-02-21
申请号：US14540561
申请日：2014-11-13
申请人： Phillip M. Adams
发明人： Phillip M. Adams
IPC分类号： G06F15/16 , G08B23/00 , G06F21/10 , G06Q50/18 , H04L12/26 , H04L29/06
CPC分类号： G06F21/105 , G06F21/10 , G06F2221/074 , G06Q50/184 , H04L43/08 , H04L63/0245 , H04L63/1408 , H04L2209/605 , H04L2209/606 , H04L2209/608 , H04L2463/103 , Y10S705/904 , Y10S705/908 , Y10S705/911
摘要： An engine identifying segments or portions of one source material or source file common to or found in another source material or file. The engine may receive a first data stream in binary form as well as a second stream in binary form. The engine may include a data stream processor or pre-processor programmed to translate the first and second data streams to generate respective first and second processed data streams. The commonality between the first and second processed data streams may be greater than the commonality between the first and second data streams themselves. Also, a comparator may be programmed to compare the first and second process data streams and identify binary segments found in both the first and second processed data streams.
摘要翻译：识别在另一个源材料或文件中共同或发现的一个源材料或源文件的片段或部分的引擎。引擎可以以二进制形式接收第一数据流以及二进制形式的第二流。引擎可以包括被编程为转换第一和第二数据流以产生相应的第一和第二处理数据流的数据流处理器或预处理器。第一和第二处理数据流之间的共同性可以大于第一和第二数据流本身之间的共同性。此外，比较器可以被编程为比较第一和第二处理数据流并识别在第一和第二处理数据流中找到的二进制段。

5. 发明申请

US20160105287A1 DEVICE AND METHOD FOR TRACEABLE GROUP ENCRYPTION 审中-公开
标题翻译：可追踪组加密的装置和方法
公开(公告)号：US20160105287A1
公开(公告)日：2016-04-14
申请号：US14888413
申请日：2014-04-30
申请人： THOMSON LICENSING
发明人： Marc JOYE , Benoit LIBERT
IPC分类号： H04L9/32 , H04L29/06 , H04L9/30
CPC分类号： H04L9/3255 , H04L9/3013 , H04L63/0428 , H04L2209/606
摘要： A group encryption system comprising at least one group member device, a group manager device, an opening authority device, a sender device and a tracing agent device. The sender device is configured to encrypt a plaintext using the public key of a group member. The group member device is configured to receive and decrypt the ciphertext using the corresponding private key, and also to claim or disclaim a ciphertext. The opening authority device is configured to disclose at least one user-specific trapdoor that makes it possible to trace, by the tracing agent device, all the ciphertexts for the specified user and only those ciphertexts.
摘要翻译：一种组加密系统，包括至少一个组成员设备，组管理器设备，开放授权设备，发送者设备和跟踪代理设备。发件人设备配置为使用组成员的公钥加密明文。组成员设备被配置为使用相应的私钥接收和解密密文，并且还声明或拒绝密文。开放授权装置被配置为公开至少一个用户特定的陷门，其使得可以通过跟踪代理设备跟踪指定用户的所有密文以及只有那些密文。

6. 发明授权

US09294276B2 Countering server-based attacks on encrypted content 有权
标题翻译：针对加密内容的基于服务器的攻击
公开(公告)号：US09294276B2
公开(公告)日：2016-03-22
申请号：US14176515
申请日：2014-02-10
申请人： INTERNATIONAL BUSINESS MACHINES CORPORATION
发明人： Jeffrey B. Lotspiech
IPC分类号： H04L9/14 , G09C1/00 , H04L9/08
CPC分类号： H04L9/14 , G09C1/00 , H04L9/002 , H04L9/0822 , H04L2209/606
摘要： Embodiments of the present invention relate to providing encrypted content to authorized content consumers while providing robust traitor tracing. In one embodiment, a key bundle comprising at least one device key is read. A key block is read. A media key precursor is determined from the key block and the at least one device key. A security program is read. At least one encrypted block key is read. The security program is executed to determine a decrypted block key from the media key precursor and the encrypted block key. Encrypted content is read. The decrypted block key is applied to the encrypted content to obtain decrypted content.
摘要翻译：本发明的实施例涉及向授权的内容消费者提供加密的内容，同时提供鲁棒的叛逆者追踪。在一个实施例中，读取包括至少一个设备密钥的密钥束。读取一个关键块。从密钥块和至少一个设备密钥确定媒体密钥前缀。读取安全程序。读取至少一个加密块密钥。执行安全程序以从媒体密钥前身和加密块密钥确定解密的块密钥。读取加密内容。解密的块密钥被应用于加密的内容以获得解密的内容。

7. 发明授权

US09066082B2 Forensics in multi-channel media content 有权
标题翻译：取证在多频道媒体内容
公开(公告)号：US09066082B2
公开(公告)日：2015-06-23
申请号：US13842715
申请日：2013-03-15
申请人： International Business Machines Corporation
发明人： John Bernard Geagan, III , Dulce B. Ponceleon
IPC分类号： H04N21/4405 , H04N7/167 , H04N19/597 , G11B20/00 , H04N19/50 , H04N19/167 , H04N19/30 , H04N19/11 , H04N19/109 , H04N19/157 , H04N19/187 , G06F12/14
CPC分类号： H04N19/597 , G11B20/00086 , G11B20/00173 , H04L2209/606 , H04N7/167 , H04N7/1675 , H04N13/194 , H04N19/109 , H04N19/11 , H04N19/157 , H04N19/167 , H04N19/187 , H04N19/30 , H04N19/50 , H04N21/2347 , H04N21/4405 , H04N21/816
摘要： Embodiments of the invention relate to encoding multi-channel media content. In one embodiment, a set of multi-channel media content is received. The set of multi-channel media content includes a plurality of content frames. Each content frame includes a first channel content frame and second channel content frame. Each of the first channel content frames is grouped into a first group of content frames. Each of the second channel content frames is grouped into a second group of content frames. Each content frame in the first group of content frames is encoded. At least a first content frame in the first group of content frames includes at least one variation, where the variation is a different version of the first content frame. Each content frame in the second group of content frames is also encoded, where the second group of content frames is absent any content frames including a variation.
摘要翻译：本发明的实施例涉及编码多频道媒体内容。在一个实施例中，接收一组多频道媒体内容。所述多频道媒体内容的集合包括多个内容帧。每个内容帧包括第一频道内容帧和第二频道内容帧。每个第一频道内容帧被分组成第一组内容帧。每个第二频道内容帧被分组成第二组内容帧。第一组内容帧中的每个内容帧被编码。第一组内容帧中的至少第一内容帧包括至少一个变体，其中变化是第一内容帧的不同版本。第二组内容帧中的每个内容帧也被编码，其中第二组内容帧不存在包括变化的任何内容帧。

8. 发明授权

US08824728B2 Method and system for tracking illegal distributor and preventing illegal content distribution 有权
标题翻译：跟踪非法分销商和防止非法内容分发的方法和系统
公开(公告)号：US08824728B2
公开(公告)日：2014-09-02
申请号：US13332641
申请日：2011-12-21
申请人： Sang-Woo Lee , Yun-Kyung Lee , Sin Hyo Kim , Byung Ho Chung , Hyeran Mun , Sokjoon Lee , Gun Tae Bae , Jung Yeon Hwang , Hyun Sook Cho
发明人： Sang-Woo Lee , Yun-Kyung Lee , Sin Hyo Kim , Byung Ho Chung , Hyeran Mun , Sokjoon Lee , Gun Tae Bae , Jung Yeon Hwang , Hyun Sook Cho
IPC分类号： G06K9/00 , H04N21/2743 , H04N21/426 , H04N7/26 , H04N21/254 , H04N21/8358 , H04L9/32 , H04N21/8352 , H04N21/242 , G06T1/00 , H04N21/258 , H04N21/234 , H04N21/2383 , H04N21/658
CPC分类号： H04L9/3226 , G06T1/0021 , H04L2209/606 , H04L2209/608 , H04N19/467 , H04N21/23418 , H04N21/2383 , H04N21/242 , H04N21/2541 , H04N21/25866 , H04N21/2743 , H04N21/42684 , H04N21/6582 , H04N21/8352 , H04N21/8358
摘要： A system for tracking an illegal distributor and preventing an illegal content distribution includes: a forensic mark generator for receiving content and a content identification code from a content providing apparatus to generate a forensic mark; a forensic mark database for storing the generated forensic mark; a forensic mark insertion unit for inserting the forensic mark into the content; and a content database for storing the content into which the forensic mark has been inserted. The system further includes a content transmitter for transmitting the content into which the forensic mark has been inserted to the content utilization apparatus.
摘要翻译：用于跟踪非法分发者并防止非法内容分发的系统包括：用于从内容提供设备接收内容的内容识别码和用于生成法医标记的取证标记生成器; 用于存储生成的法医标记的法医标记数据库; 用于将法医标记插入到内容中的法医标记插入单元; 以及内容数据库，用于存储已经插入了法医标记的内容。该系统还包括内容发送器，用于将已经将法医标记插入的内容发送到内容利用装置。

9. 发明授权

US08774408B2 Traceable method and system for broadcasting digital data 有权
标题翻译：可溯源的数字数据广播方法和系统
公开(公告)号：US08774408B2
公开(公告)日：2014-07-08
申请号：US13000305
申请日：2009-06-23
申请人： Olivier Billet , Ryad Benadjila
发明人： Olivier Billet , Ryad Benadjila
IPC分类号： H04L9/20 , H04L9/08
CPC分类号： H04L9/0836 , H04L2209/606
摘要： A method and system for a user to obtain a derived value Kr of m bits, in which, given two pseudo-random functions g0 and g1 from m bits to m bits, said user obtains, on the basis of an input parameter consisting of a word r of n bits, a derived value Kr=grn∘ . . . gr2∘gr1 (S), where, for i=1, . . . , n, gri=g0 if ri=0, and gri=g1 if ri=1, and where S is a master value of m bits which is not disclosed to said user. This method comprises the following steps: a search is conducted, from among a set of words of m bits Uj, where j=1, . . . , p, recorded in a table TU and equal to Uj=gvl(j)(j)∘ . . . gv2(j)∘gv1(j) (S), where, for i=1, . . . , l(j), the indices vi(j) are predetermined bits, for a word Uσ equal to Uσ=grl(σ)∘ . . . gr2∘gr1 (S); said derived value Kr is thereafter obtained by calculating Kr=grn∘ . . . grl(σ)+1 (Uσ).Application to the encryption/decryption of pay-per-use digital contents, and to authentication.
摘要翻译：一种用于获得m比特的导出值Kr的方法和系统，其中给定从m比特到m比特的两个伪随机函数g0和g1，所述用户基于由 n位的字r，派生值Kr = grn o。。。 gr2 ogr1（S），其中，对于i = 1，。。如果ri = 0，则n，gri = g0，如果ri = 1，则gri = g1，其中S是未向所述用户公开的m位的主值。该方法包括以下步骤：从m位Uj的一组单词中进行搜索，其中j = 1，...。。。，p，记录在表TU中并且等于Uj = gvl（j）（j）o。。。 gv2（j）∘gv1（j）（S），其中，对于i = 1，。。，l（j），索引vi（j）是字U＆sgr的预定位; 等于U＆sgr; = grl（＆sgr;）o。。。 gr2 ogr1（S）; 然后通过计算Kr = grn0获得所述导出值Kr。。。 grl（＆sgr;）+ 1（U＆sgr;）。应用于按使用付费数字内容的加密/解密，以及认证。

10. 发明授权

US08533849B2 Traitor tracing in a content protection system 失效
标题翻译：叛徒追踪内容保护系统
公开(公告)号：US08533849B2
公开(公告)日：2013-09-10
申请号：US12877001
申请日：2010-09-07
申请人： Hongxia Jin , Serdar Pehlivanoglu
发明人： Hongxia Jin , Serdar Pehlivanoglu
IPC分类号： H04L29/06
CPC分类号： G06F21/105 , H04L2209/606
摘要： A method for detecting at least one traitor computer system among a plurality of receiver computer systems including: assigning a version of protected content to each of the plurality of receiver computer systems that are currently identified as innocent by a content protection system that monitors distribution of protected content to the plurality of receiver computer systems; recovering at least one unauthorized rebroadcast of the content; generating a score for each of the plurality of receiver computer systems with respect to the recovered unauthorized rebroadcast; calculating a threshold independent of an estimation of maximum traitor computer systems; checking a highest score against the threshold; incriminating a receiver computer system having the highest score above the threshold as a traitor computer system; and removing any unauthorized rebroadcasts overlapping with the traitor computer system. The process may be repeated from generating scores until all traitors are identified.
摘要翻译：一种用于在多个接收机计算机系统中检测至少一个叛逆计算机系统的方法，包括：将受保护内容的版本分配给当前被识别为无害的多个接收机计算机系统中的每一个，所述内容保护系统监视受保护的内容到多个接收机计算机系统; 恢复内容的至少一次未经授权的转播; 对于所述多个接收机计算机系统中的每一个相对于所述恢复的未经授权的转播而生成分数; 计算独立于最大叛逆计算机系统的估计的阈值; 根据阈值检查最高分数; 将具有高于阈值的最高分数的接收机计算机系统作为叛徒计算机系统; 并删除与叛逆计算机系统重叠的任何未经授权的转播。可以从产生评分重复该过程，直到所有叛徒被识别。

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