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1. 发明申请

US20190182244A1 SECURING DIGITAL DATA TRANSMISSION IN A COMMUNICATION NETWORK 审中-公开
公开(公告)号：US20190182244A1
公开(公告)日：2019-06-13
申请号：US15838972
申请日：2017-12-12
申请人： NAGRAVISION S.A. , OpenTV, Inc.
发明人： Pierre SARDA , Didier HUNACEK , John TINSMAN , Philippe STRANSKY-HEILKRON
IPC分类号： H04L29/06 , G06F21/44 , H04L9/32 , H04L9/08 , H04N21/8358
摘要： A method for securing transmission of digital data in a communication network comprising a central station or a terminal and at least one device monitored by the central station via the communication network. The at least one device is configured to produce and to transmit a digital data stream to the central station or terminal. The at least one device further comprises a secure non-volatile memory for storing at least device specific information. The at least one device forms a data block based on at least the device specific information stored in the secure memory. The data block thus formed may compose additional data to be merged with the digital data stream produced by the at least one device. A modified digital data stream results from this merging operation and is transmitted by the at least one device to the central station or terminal.

2. 发明申请

US20180034625A1 DEVICE KEYS PROTECTION 审中-公开
公开(公告)号：US20180034625A1
公开(公告)日：2018-02-01
申请号：US15535334
申请日：2015-12-08
申请人： NAGRAVISION S.A.
发明人： Didier HUNACEK , Marco MACCHETTI , Nicolas FISCHER
IPC分类号： H04L9/00 , H04L9/32 , H04L29/06
CPC分类号： H04L9/003 , G06F21/445 , H04L9/006 , H04L9/3234 , H04L63/0435 , H04L63/0442 , H04L63/061
摘要： A method to protect a device key in a device comprising at least one secure element locally connected to at least one time programmable memory storing a global value in form of a bit string comprising locked bits and unlocked bits. The locked bits are irreversibly pre-programmed in the one-time-programmable memory during an initialization phase of the device while the unlocked bits remaining in an initial state may be programmable by the secure element. The secure element is configured to generate, at initialization of the device, a device specific value by using the global value, program the device specific value previously obtained in the one time programmable memory, and erase the global value by programming the unlocked bits of the corresponding bit string. A further object of the disclosure includes a device configured to carry out the method.

3. 发明申请

US20210385517A1 METHOD AND SYSTEM TO SHARE A SNAPSHOT EXTRACTED FROM A VIDEO TRANSMISSION 有权
公开(公告)号：US20210385517A1
公开(公告)日：2021-12-09
申请号：US17350226
申请日：2021-06-17
申请人： NAGRAVISION S.A.
发明人： Didier HUNACEK , Olivier SCHAER , Frederic THOMAS
IPC分类号： H04N21/2743 , H04N21/475 , H04N21/4788 , H04L29/08 , H04N21/433 , H04N21/61 , H04N21/8549
摘要： The present invention refers to the field of television experience in particular the simultaneous use of the portable computing device and a television to share a user's experience. The present disclosure proposes a method to create a snapshot from a video transmission received by a receiver, said receiver being connected with a portable computing device and having a screen output, said method comprising the steps of receiving a video transmission by the receiver, converting by the receiver, the video transmission into a lower-bandwidth video transmission, sending the lower-bandwidth video transmission to the portable computing device, receiving from the portable computing device to the receiver, a command to execute a snapshot, producing by the receiver a snapshot from the video transmission, sending the snapshot to the portable computing device.

4. 发明申请

US20190280853A1 DEVICE KEYS PROTECTION 审中-公开
公开(公告)号：US20190280853A1
公开(公告)日：2019-09-12
申请号：US16238301
申请日：2019-01-02
申请人： NAGRAVISION S.A.
发明人： Didier HUNACEK , Marco MACCHETTI , Nicolas FISCHER
IPC分类号： H04L9/00 , H04L29/06 , G06F21/44 , H04L9/32
摘要： A method to protect a device key in a device comprising at least one secure element locally connected to at least one time programmable memory storing a global value in form of a bit string comprising locked bits and unlocked bits. The locked bits are irreversibly pre-programmed in the one-time-programmable memory during an initialization phase of the device while the un-locked bits remaining in an initial state may be programmable by the secure element. The secure element is configured to generate, at initialization of the device, a device specific value by using the global value, program the device specific value previously obtained in the one time programmable memory, and erase the global value by programming the unlocked bits of the corresponding bit string. A further object of the disclosure includes a device configured to carry out the method.

5. 发明申请

US20160088366A1 METHOD FOR WATERMARKING MEDIA CONTENT AND SYSTEM FOR IMPLEMENTING THIS METHOD 有权
标题翻译：用于实施该方法的媒体内容和系统的方法
公开(公告)号：US20160088366A1
公开(公告)日：2016-03-24
申请号：US14786917
申请日：2014-04-11
申请人： NAGRAVISION S.A.
发明人： Didier HUNACEK , Patrick SERVET , Marco MACCHETTI
IPC分类号： H04N21/8358 , H04N21/418 , H04N21/8355 , H04N21/4405 , H04N21/6334
CPC分类号： H04N21/8358 , H04N21/4181 , H04N21/4405 , H04N21/63345 , H04N21/8355
摘要： A method for watermarking digital media content received in a form of at least one encrypted sample to which metadata is assigned. Each sample is encrypted by means of a sample key. The metadata comprises first data, second data and a signature resulting from the first and second data. The first data is encrypted by a transport key and comprises at least a content key and watermarking metadata. The second data comprises an initialization vector so that the content key and the initialization vector form a unique pair of cryptographic data equivalent to the sample key. The method comprises the steps of extracting the metadata from the media content, decrypting the first data by using the transport key, authenticating the signed data and, in case of positive outcome, descrambling each sample by using the pair of cryptographic data, and marking each descrambled sample by using the watermarking metadata.
摘要翻译：一种用于以以分配了元数据的至少一个加密样本的形式接收的数字媒体内容进行水印处理的方法。每个样本都通过样本密钥进行加密。元数据包括第一数据，第二数据和由第一和第二数据产生的签名。第一数据由传输密钥加密，并且至少包括内容密钥和水印元数据。第二数据包括初始化向量，使得内容密钥和初始化向量形成与样本密钥相当的唯一的密码数据对。该方法包括以下步骤：从媒体内容中提取元数据，使用传输密钥解密第一数据，对签名数据进行认证;如果是肯定结果，则使用该密码数据对每个样本进行解扰，通过使用水印元数据解扰抽样。

6. 发明申请

US20190132651A1 EMBEDDING WATERMARKING DATA 审中-公开
公开(公告)号：US20190132651A1
公开(公告)日：2019-05-02
申请号：US16074243
申请日：2017-01-31
申请人： NAGRAVISION S.A.
发明人： Didier HUNACEK
IPC分类号： H04N21/8358 , H04N21/2362 , H04N21/845 , H04N21/2343
摘要： The disclosure provides a method of making watermarking data embedded in an Elementary Stream ES accessible to a receiver. The ES comprises video and/or audio data and is to be transmitted as a Packetized Elementary Stream PES in a Transport Stream TS such that the receiver can use the watermarking data to watermark the video and/or audio data in the ES without reconstructing the ES from the TS. The watermarking data identifies one or more watermarking locations in the video and/or audio data in the ES to be modified by the receiver in accordance with the watermarking data. The method comprises determining respective one or more watermarking TS locations in the TS corresponding to the one or more watermarking locations. The method further comprises embedding, in the ES, the watermarking data including watermarking location information identifying the one or more watermarking TS locations, or modifying watermarking data embedded in the ES by adding the watermarking location information. The method may further comprise subsequent to embedding or modifying the watermarking data, packetizing the ES into one or more PES packets, each packet comprising a packet header, and adding watermarking data location information identifying a location in the TS corresponding to a location of the watermarking data in the ES to the packet header of a PES packet (or in a TS header or elsewhere in the TS). The disclosure also provides a corresponding method of watermarking and related systems, devices, computer programs and Transport Streams.

7. 发明申请

US20140177834A1 METHOD TO ENFORCE WATERMARKING INSTRUCTIONS IN A RECEIVING DEVICE 有权
标题翻译：在接收设备中执行水印说明的方法
公开(公告)号：US20140177834A1
公开(公告)日：2014-06-26
申请号：US14134687
申请日：2013-12-19
申请人： Nagravision S.A.
发明人： Didier HUNACEK , Patrick SERVET
IPC分类号： H04N7/167
CPC分类号： H04N7/1675 , H04N21/4353 , H04N21/4405 , H04N21/4623 , H04N21/4627 , H04N21/63345 , H04N21/8355 , H04N21/8358
摘要： A method to enforce watermarking instructions by a security module in a receiving device, comprising the steps of receiving a security message by—a security module, comprising at least a content key, watermark instructions and security message signature, said watermark instruction activates or deactivates a watermarking module, decrypting—a security message with a transmission key, verifying—a security message signature, and in case of successful verification, reading a watermarking data from the watermarking module, verifying the authenticity of the watermarking data, and in case of successful verification, transmitting the watermark instructions to the watermark module and the content key to a descrambling module.
摘要翻译：一种由接收设备中的安全模块实施水印指令的方法，包括以下步骤：由至少包括内容密钥，水印指令和安全消息签名的安全模块接收安全消息，所述水印指令激活或去激活水印模块，解密 - 具有传输密钥的安全消息，验证安全消息签名，并且在成功验证的情况下，从水印模块读取水印数据，验证水印数据的真实性，以及在成功验证的情况下将水印指令发送到水印模块和内容密钥到解扰模块。

8. 发明申请

US20210160065A1 CRYPTOGRAPHIC KEY CONFIGURATION USING PHYSICAL UNCLONABLE FUNCTION 有权
公开(公告)号：US20210160065A1
公开(公告)日：2021-05-27
申请号：US17256673
申请日：2019-06-21
申请人： NAGRAVISION S.A.
发明人： Didier HUNACEK , Marco MACCHETTI , Jerome PERRINE
IPC分类号： H04L9/08 , H04L9/32
摘要： The disclosure relates to a method of obtaining a cryptographic key in a chipset (1). An initial configuration message may be generated using a physical unclonable function (hereinafter: PUF) (22) of the chipset (1). Said PUF (22) may generate a predetermined value when using the initial configuration message as input to the PUF (22). The initial configuration message may be transmitted to a client access server (31). An altered configuration message may be received from the client access server (31), wherein the altered configuration message is generated by the client access server (31) based on the initial configuration message. The cryptographic key may be obtained from the PUF (22) using the altered configuration message as input to the PUF (22).

9. 发明申请

US20200068244A1 PRE-ENTITLEMENT ENFORCEMENT 审中-公开
公开(公告)号：US20200068244A1
公开(公告)日：2020-02-27
申请号：US16609837
申请日：2018-05-03
申请人： NAGRAVISION S.A.
发明人： Didier HUNACEK , Jean-Bernard FISCHER
IPC分类号： H04N21/266 , H04N21/235 , H04N21/4623 , H04N21/6334 , H04N21/418
摘要： A method of transmitting entitlement messages to content consumption devices in a access control system, the method comprising periodically transmitting entitlement messages to content consumption devices in a access control system and periodically extending an expiry time comprised in the entitlement messages. The entitlement messages comprise indicator data indicating to the content consumption devices that subsequent entitlement messages loaded into a content consumption device after a first entitlement message is loaded into the content consumption device shall not be used by the content consumption device to access protected media content.

10. 发明申请

US20190052916A1 CONTENT PROTECTION 审中-公开
公开(公告)号：US20190052916A1
公开(公告)日：2019-02-14
申请号：US16075102
申请日：2016-06-29
申请人： NAGRAVISION S.A.
发明人： Christian SCHWARZ , André NICOULIN , Didier HUNACEK
IPC分类号： H04N21/2347 , H04N21/266 , H04N21/418 , H04N21/4405 , H04N21/4623 , H04N7/167 , G06F21/57 , H04L9/32 , H04L9/16
摘要： Devices, servers, systems and methods for content protection are provided. Disclosed embodiments improve temporal granularity of controlling access to the protected content and increase resilience against attacks attempting to prevent re-evaluation of conditions of access. Enforcement of re-evaluation may be based on the receipt and/or verification of tokens. In some embodiments, re-evaluation is enforced by periodically rendering content keys required for content decryption unuseable and/or clearing content keys already in use.

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