专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US11683542B2 Systems and methods for distributing content using a common set of encryption keys 有权
公开(公告)号：US11683542B2
公开(公告)日：2023-06-20
申请号：US17024373
申请日：2020-09-17
申请人： DIVX, LLC
发明人： Michael George Kiefer , Eric William Grab , Jason Braness
IPC分类号： H04N21/2347 , H04L9/08 , H04L9/32 , H04N21/647 , H04L9/40 , H04N21/254 , H04N21/4408 , H04N21/4627 , H04N21/6334 , H04L9/14
CPC分类号： H04N21/2347 , H04L9/0819 , H04L9/0822 , H04L9/0861 , H04L9/14 , H04L9/32 , H04L63/0428 , H04N21/2541 , H04N21/4408 , H04N21/4627 , H04N21/6334 , H04N21/64715 , H04L2209/603
摘要： Systems and methods for performing adaptive bitrate streaming using alternative streams of protected content in accordance with embodiments of the invention are described. One embodiment of the invention includes a processor, and memory containing a client application. In addition, the client application configures the processor to: request a top level index file identifying a plurality of alternative streams of protected content, where each of the alternative streams of protected content are encrypted using common cryptographic information; obtain the common cryptographic information; request portions of content from at least the plurality of alternative streams of protected content; access the protected content using the common cryptographic information; and playback the content.

2. 发明授权

US10055553B2 PC secure video path 有权
公开(公告)号：US10055553B2
公开(公告)日：2018-08-21
申请号：US15084203
申请日：2016-03-29
申请人： Comcast Cable Communications, LLC
发明人： James W. Fahrny
IPC分类号： G06F21/00 , G06F21/10 , H04L9/08 , H04N21/647 , G06F21/60 , H04L29/06
CPC分类号： G06F21/10 , G06F21/606 , G06F2221/0797 , H04L9/08 , H04L9/0827 , H04L63/0884 , H04N21/64715
摘要： A system and method are disclosed for creating a secure video content path, or a protected media content bus, within an unsecure personal computer. A portable security module, or electronic key safe, may be inserted into a personal computer that has different internal components for processing secure and unsecured content. The security module may establish a secure encrypted link with a secure video processor of the personal computer, and may use the personal computer's network interface to request authority to receive secured content. The security module may provide content keys to the secure video processor to access secured content received over an external network.

3. 发明授权

US09888283B2 Systems and methods for performing transport I/O 有权
公开(公告)号：US09888283B2
公开(公告)日：2018-02-06
申请号：US13799891
申请日：2013-03-13
申请人： Nagrastar LLC
发明人： William Michael Beals , Nicolas Fischer , Benjamin Brian Ellis , Gregory Duval
IPC分类号： H04N21/41 , H04N21/44 , H04N21/418 , H04L9/14 , H04N21/647 , H04N21/234 , H04N21/24 , H04N21/4367 , H04N21/4623 , H04N21/835 , H04N21/4405 , H04N21/4408
CPC分类号： H04N21/44004 , H04L9/14 , H04L2209/16 , H04N21/23406 , H04N21/2401 , H04N21/4181 , H04N21/4367 , H04N21/4405 , H04N21/4408 , H04N21/4623 , H04N21/64715 , H04N21/835
摘要： Systems and methods for implementing a Transport I/O system are described. Network encrypted content may be received by a device. The device may provide the network encrypted content to a secure processor, such as, for example, a smart card. The secure processor obtains a network control word that may be used to decrypt the network encrypted content. The secure processor may decrypt the network encrypted content to produce clear content. In embodiments, the secure processor may then use a local control word to generate locally encrypted content specific to the device. The device may then receive the locally encrypted content from the secure processor and proceed to decrypt the locally encrypted content using a shared local encryption key. The Transport I/O system ensures the protection of the network control word by maintaining the network control word on the secure processor.

4. 发明授权

US09888270B2 High throughput network encryptionusing CCAP 有权
公开(公告)号：US09888270B2
公开(公告)日：2018-02-06
申请号：US13923180
申请日：2013-06-20
申请人： Time Warner Cable Enterprises LLC
发明人： Niem Dang , Tom Gonder , Peter J. Arnts , Kirk Erichsen , Brian Floyd , Michael Kelsen
IPC分类号： H04N21/2347 , H04N21/61 , H04N21/647 , H04N21/643 , H04N21/6405 , H04N21/6408 , H04L29/06 , H04H20/69 , H04H60/14
CPC分类号： H04N21/2347 , H04H20/69 , H04H60/14 , H04L63/0428 , H04N21/6118 , H04N21/6125 , H04N21/6405 , H04N21/6408 , H04N21/64322 , H04N21/64707 , H04N21/64715
摘要： A video distribution network includes a distribution plant and a first bulk encryption device connected to the distribution plant, wherein the bulk encryption device outputs a first encrypted video service stream to the distribution plant via an internet protocol (IP) interface.

5. 发明申请

US20170230728A1 METHODS AND SYSTEMS FOR RE-SECURING A COMPROMISED CHANNEL IN A SATELLITE SIGNAL DISTRIBUTION ENVIRONMENT 审中-公开
公开(公告)号：US20170230728A1
公开(公告)日：2017-08-10
申请号：US15496470
申请日：2017-04-25
申请人： BCE INC.
发明人： Ovidiu Octavian POPA , Alexander ISHANKOV , Alan DAGENAIS , Louie ANDRIANO , Bratislav BECIC , Tim DINESEN
IPC分类号： H04N21/647 , H04N21/61 , H04L29/06 , H04L9/14 , H04L9/30 , H04L9/32 , H04N21/266 , H04L9/08
CPC分类号： H04N21/64715 , H04L9/0861 , H04L9/0891 , H04L9/14 , H04L9/30 , H04L9/3247 , H04L63/0428 , H04L63/1408 , H04L2209/60 , H04N21/26606 , H04N21/26613 , H04N21/6143 , H04N21/6193 , H04N21/64723
摘要： A method implemented by a set top box that encrypts communications for a channel stacking switch (CS) using a public key of the CSS, the method comprising: obtaining a message from a head end; extracting electronic counter measure (ECM) data from the message; sending the ECM data to the CSS; receiving, in response to the sending, a new public key of the CSS; encrypting communications for the CSS using the new public key of the CSS. Also, a method for implementation by a CSS, comprising: maintaining a private key and a public key; obtaining ECM data sent by a set top box in communication with the CSS; obtaining an identifier of the CSS; formulating a new public key based on the private key, the identifier and the ECM; rendering the new public key available to the set top box.

6. 发明申请

US20160350517A1 PC Secure Video Path 审中-公开
公开(公告)号：US20160350517A1
公开(公告)日：2016-12-01
申请号：US15084203
申请日：2016-03-29
申请人： Comcast Cable Communications, LLC
发明人： James W. Fahrny
IPC分类号： G06F21/10 , H04N21/647 , G06F21/60 , H04L9/08 , H04L29/06
CPC分类号： G06F21/10 , G06F21/606 , G06F2221/0797 , H04L9/08 , H04L9/0827 , H04L63/0884 , H04N21/64715
摘要： A system and method are disclosed for creating a secure video content path, or a protected media content bus, within an unsecure personal computer. A portable security module, or electronic key safe, may be inserted into a personal computer that has different internal components for processing secure and unsecured content. The security module may establish a secure encrypted link with a secure video processor of the personal computer, and may use the personal computer's network interface to request authority to receive secured content. The security module may provide content keys to the secure video processor to access secured content received over an external network.

7. 发明授权

US09497514B2 DTCP converter for HLS 有权
标题翻译：用于HLS的DTCP转换器
公开(公告)号：US09497514B2
公开(公告)日：2016-11-15
申请号：US14312536
申请日：2014-06-23
申请人： General Instrument Corporation
发明人： Paul Moroney , Geetha Mangalore , William P. Franks
IPC分类号： H04N21/647 , H04N7/167 , H04N7/173 , H04N21/235 , H04N21/2381 , H04N21/266 , H04N21/418 , H04N21/433 , H04N21/435 , H04N21/472 , H04N21/6587 , H04L9/08 , H04L29/06 , H04N21/41 , H04N21/4402 , H04N21/4408 , H04N21/61 , H04N21/2343 , H04N21/4363 , H04N21/643 , H04N21/8355 , H04N21/845 , H04N21/262 , H04N21/482
CPC分类号： H04N21/64715 , H04L9/0861 , H04L63/00 , H04L63/061 , H04L63/123 , H04L65/1026 , H04L65/608 , H04L65/80 , H04L69/16 , H04L2209/20 , H04L2209/60 , H04N7/1675 , H04N7/17318 , H04N21/23439 , H04N21/2351 , H04N21/2381 , H04N21/26258 , H04N21/26613 , H04N21/4126 , H04N21/4181 , H04N21/433 , H04N21/435 , H04N21/4363 , H04N21/440218 , H04N21/4408 , H04N21/47217 , H04N21/4825 , H04N21/6118 , H04N21/6131 , H04N21/64322 , H04N21/6587 , H04N21/8355 , H04N21/8456
摘要： A method for DTCP to HLS conversion is provided that starts with a standard DTCP Protected Content Packet (PCP) structure. The PCP payload data is chunked at defined chunk boundaries. Each chunk is then appended with a pad to be compatible with HLS. An HLS playlist is then provided using the PCP header with identification of the chunks and a keytag. The chunk is encrypted with a DTCP key calculated by the DTCP standard using: (a) copy control bits; (b) a nonce, and (c) an exchange key ID. Relevant PCP header fields are provided in the keytag for the HLS playlist, including the value of the copy control bits, the nonce and the exchange key ID, supporting the transaction that enables calculation of the DTCP content key to enable later decryption of the chunks.
摘要翻译：提供了一种用于DTCP到HLS转换的方法，其以标准的DTCP保护内容分组（PCP）结构开始。 PCP有效载荷数据在定义的块边界处分块。然后每个块都附加一个与HLS兼容的焊盘。然后使用具有块的标识和密钥标签的PCP头提供HLS播放列表。使用以下方式由DTCP标准计算的DTCP密钥对该块进行加密：（a）复制控制位; （b）随机数，和（c）交换密钥ID。在用于HLS播放列表的密钥标签中提供相关的PCP头字段，包括复制控制比特的值，随机数和交换密钥ID，支持可以计算DTCP内容密钥的事务，以便稍后解密该块。

8. 发明授权

US09491521B2 Trick play seek operation for HLS converted from DTCP 有权
标题翻译：从DTCP转换HLS的Trick play seek操作
公开(公告)号：US09491521B2
公开(公告)日：2016-11-08
申请号：US14312558
申请日：2014-06-23
申请人： General Instrument Corporation
发明人： Geetha Mangalore , Paul Moroney
IPC分类号： H04N7/167 , H04N21/647 , H04N7/173 , H04N21/235 , H04N21/2381 , H04N21/266 , H04N21/418 , H04N21/433 , H04N21/435 , H04N21/472 , H04N21/6587 , H04L9/08 , H04L29/06 , H04N21/41 , H04N21/4402 , H04N21/4408 , H04N21/61 , H04N21/2343 , H04N21/4363 , H04N21/643 , H04N21/8355 , H04N21/845 , H04N21/262 , H04N21/482
CPC分类号： H04N21/64715 , H04L9/0861 , H04L63/00 , H04L63/061 , H04L63/123 , H04L65/1026 , H04L65/608 , H04L65/80 , H04L69/16 , H04L2209/20 , H04L2209/60 , H04N7/1675 , H04N7/17318 , H04N21/23439 , H04N21/2351 , H04N21/2381 , H04N21/26258 , H04N21/26613 , H04N21/4126 , H04N21/4181 , H04N21/433 , H04N21/435 , H04N21/4363 , H04N21/440218 , H04N21/4408 , H04N21/47217 , H04N21/4825 , H04N21/6118 , H04N21/6131 , H04N21/64322 , H04N21/6587 , H04N21/8355 , H04N21/8456
摘要： A process to enable trick play operations is provided for HLS streaming video that has been converted by a system from DTCP. The system server provides a modified SEEK operation when an HLS GET message is received from an HLS client player. For the process, a DLNA header is provided from the HLS client player by including it in the HLS GET message. The HLS client also provides a DLNA RANGE REQUEST that requests a range of chunks making up a video desired and a seek point from where a seek operation is needed. The HLS server recognizes the DLNA header of the HLS GET message and DLNA RANGE REQUEST and obtains a range of chunks making up an extent of the recorded video using metadata fields. The server then generates a new HLS playlist with identification of the chunks and keytag corresponding to the seek operation. The server will provide chunks from the seek point and a rolling playlist to identify chunks and keytag from the seek point.
摘要翻译：为由DTCP转换的HLS流视频提供了进行特技播放操作的过程。当从HLS客户端播放器接收到HLS GET消息时，系统服务器提供修改的SEEK操作。对于该过程，从HLS客户端播放器提供DLNA报头，将其包括在HLS GET消息中。 HLS客户端还提供DLNA范围请求，其请求构成所需视频的块的范围以及需要搜索操作的搜索点。 HLS服务器识别HLS GET消息和DLNA RANGE REQUEST的DLNA报头，并使用元数据字段获得组成记录视频范围的块的范围。然后，服务器生成具有与搜索操作对应的块和密钥标签的新HLS播放列表。服务器将从搜索点和滚动播放列表中提供块，以从查找点识别块和密钥标签。

9. 发明授权

US09319752B2 Robust watermark 有权
标题翻译：可靠的水印
公开(公告)号：US09319752B2
公开(公告)日：2016-04-19
申请号：US14324751
申请日：2014-07-07
申请人： Cisco Technology Inc.
发明人： Itsik Mantin , Aviad Kipnis
IPC分类号： G06K9/00 , H04N21/647 , G06T1/00 , H04N7/167 , H04N21/2389 , H04N21/8355 , H04N21/8358
CPC分类号： H04N21/64715 , G06T1/0021 , G06T1/005 , G06T2201/0061 , H04N7/1675 , H04N21/23892 , H04N21/8355 , H04N21/8358
摘要： A method and system for embedding a watermark in block encrypted content, including encoding a bit string, the bit string including n bits, denoted b0-bn−1, the encoding including translating each bit, b0-bn−1, into a block of data, according to the following rule if bi=1, then translate bi into a block of data of a first type, and if bi=0, then translate bi into a block of data of a second type, thereby translating the n bits into n blocks of data corresponding to each bit b0-bn−1, arranging a composite block of data including the n blocks of data, and at least one additional block indicating the presence of the n blocks of data, and inserting the composite block of data into a content item as a watermark, wherein the watermarked content item is encrypted using an ECB mode of encryption. Related methods and apparatus are also described.
摘要翻译：一种用于在块加密内容中嵌入水印的方法和系统，包括编码比特串，包括表示为b0-bn-1的n比特的比特串，包括将每个比特b0-bn-1转换成块数据，如果bi = 1，则将bi转换成第一类型的数据块，并且如果bi = 0，则将bi转换成第二类型的数据块，从而将n位转换成对应于每个位b0-bn-1的n个数据块，排列包括n个数据块的数据的合成块，以及指示存在n个数据块的至少一个附加块，以及插入复合数据块作为水印进入内容项目，其中使用ECB加密模式来加密加水印的内容项目。还描述了相关方法和装置。

10. 发明申请

US20150319476A1 METHODS AND SYSTEMS FOR RE-SECURING A COMPROMISED CHANNEL IN A SATELLITE SIGNAL DISTRIBUTION ENVIRONMENT 有权
标题翻译：在卫星信号分配环境中重新保护压缩信道的方法和系统
公开(公告)号：US20150319476A1
公开(公告)日：2015-11-05
申请号：US14745894
申请日：2015-06-22
申请人： BCE INC.
发明人： Ovidiu Octavian POPA , Alexander ISHANKOV , Alan DAGENAIS , Louie ANDRIANO , Bratislav BECIC , Tim DINESEN
IPC分类号： H04N21/266 , H04N21/61 , H04N21/647
CPC分类号： H04N21/64715 , H04L9/0861 , H04L9/0891 , H04L9/14 , H04L9/30 , H04L9/3247 , H04L63/0428 , H04L63/1408 , H04L2209/60 , H04N21/26606 , H04N21/26613 , H04N21/6143 , H04N21/6193 , H04N21/64723
摘要： A method implemented by a set top box that encrypts communications for a channel stacking switch (CS) using a public key of the CSS, the method comprising: obtaining a message from a head end; extracting electronic counter measure (ECM) data from the message; sending the ECM data to the CSS; receiving, in response to the sending, a new public key of the CSS; encrypting communications for the CSS using the new public key of the CSS. Also, a method for implementation by a CSS, comprising: maintaining a private key and a public key; obtaining ECM data sent by a set top box in communication with the CSS; obtaining an identifier of the CSS; formulating a new public key based on the private key, the identifier and the ECM; rendering the new public key available to the set top box.
摘要翻译：一种由机顶盒实现的方法，该机顶盒使用CSS的公开密钥对信道堆叠交换机（CS）进行加密，该方法包括：从头端获取消息; 从消息中提取电子对抗（ECM）数据; 将ECM数据发送到CSS; 响应发送，接收CSS的新公钥; 使用CSS的新公钥加密CSS的通信。另外，由CSS实现的方法，包括：维护私钥和公钥; 获取与CSS通信的机顶盒发送的ECM数据; 获取CSS的标识符; 基于私钥，标识符和ECM制定新的公开密钥; 将新的公钥提供给机顶盒。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式