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41. 发明申请

US20200028698A1 PROTECTING MEDIA CONTENT 审中-公开
公开(公告)号：US20200028698A1
公开(公告)日：2020-01-23
申请号：US16484343
申请日：2018-02-02
申请人： NAGRAVISION S.A.
发明人： Didier HUNACEK , Herve GOUPIL
IPC分类号： H04L9/32 , H04L29/06 , H04L9/08 , G06F21/10 , H04N21/4408 , H04N21/4627
摘要： Content source and sink devices and methods help to guard against compromising security of content transferred from a source device to a sink device, for example where a primary encryption mechanism protecting the content has been compromised. A content source device is configured to connect to a content sink device to transmit digital media content to the content sink device. The content source device includes a connection module configured to establish a connection to the sink device, encrypt a digital media content for transmission across the connection with a first cipher using a connection key, and transmit the encrypted digital media content to the sink device over the connection. The content source also includes a protection module configured to prevent the sink device from using the digital media content without authorisation. The protection module receives a digital certificate identifying the sink device, verifies the digital certificate, and determines if the digital certificate identifies a sink device authorised to receive digital media content over the connection. If the determination is positive, the protection module enables the sink device to use the digital media content.

42. 发明授权

US10476924B2 Media player for receiving media content from a remote server 有权
公开(公告)号：US10476924B2
公开(公告)日：2019-11-12
申请号：US14889694
申请日：2014-05-07
申请人： NAGRAVISION S.A.
发明人： Aditee Anil Pathak , Philippe Stransky , Gyanveer Singh
IPC分类号： G06F15/16 , H04L29/06 , H04L29/08 , H04W4/18 , H04W12/06
摘要： An embodiment of the present invention may be deployed in a system comprising a media player and a remote server operably connected to communicate with one another. The invention allows for a settings file to be stored on the remote server, the settings file comprising parameters useful for adjusting different settings on the media player such that rendering of a particular content to be made possible on the media player according to a user's predetermined taste by downloading the settings from the server onto the media player.

43. 发明申请

US20190171468A1 PERFORMING A CONTEXT-DEPENDENT TASK IN A PROGRAM 审中-公开
公开(公告)号：US20190171468A1
公开(公告)日：2019-06-06
申请号：US16322585
申请日：2017-08-03
申请人： NAGRAVISION S.A.
发明人： Alain LE PERLERIN , Pierre SARDA
IPC分类号： G06F9/451 , G06F9/445 , G06F9/54 , G06F9/48
摘要： A computer implemented method for sending context information between programs, the method including: displaying a graphical user interface including a plurality of selectable application icons; receiving a simultaneous selection of a first icon and a second icon from the plurality of selectable application icons; launching a first program associated with the first icon; launching a second program associated with the second icon; and sending context information between the first program and the second program.

44. 发明授权

US10250575B2 Utility meter for metering a utility consumption and optimizing upstream communications and method for managing these communications 有权
公开(公告)号：US10250575B2
公开(公告)日：2019-04-02
申请号：US15498107
申请日：2017-04-26
申请人： NAGRAVISION S.A.
发明人： Corinne Le Buhan , Christophe Nicolas , Joel Conus
IPC分类号： G01D4/00 , H04L9/06 , H04L29/06 , H04L9/08 , H04L9/14 , H04L9/30 , H04L9/32 , H04Q9/00
摘要： A utility meter and method for metering consumption of at least one utility including: a metering unit, a communication unit for sending/receiving messages to/from a management center, a memory to store a unique identifier pertaining to the utility meter and a first key, an encryption unit for encrypting the utility consumption as a first cryptogram, a message generator for generating a utility message containing the first cryptogram, a key generator for generating a payload key to be used by the encryption unit for encrypting the utility consumption, a second cryptogram generated by the encryption unit by encrypting the payload key with the first key, the second cryptogram being intended to be included, by the message generator, at least once into the utility message to be sent to the remote management center.

45. 发明授权

US10237305B2 Methods and systems for enabling legal-intercept mode for a targeted secure element 有权
公开(公告)号：US10237305B2
公开(公告)日：2019-03-19
申请号：US15182461
申请日：2016-06-14
申请人： NAGRAVISION S.A.
发明人： Bernard Benoit , Jean-Claude Fournier , Laurent Gauteron , Yishan Zhao , Francois Fer
IPC分类号： H04L29/06 , H04W12/04 , H04L9/08
摘要： Disclosed herein are methods and systems for enabling legal-intercept mode for a targeted secure element. In an embodiment, a method includes embedding a first key-negotiation parameter associated with a target client device into an intercept secure encryption element; configuring an encryption-management device to receive the intercept secure encryption element and to receive a second key-negotiation parameter associated with the target client device and obtained from a service-provider system, the encryption-management device configured to embed the second key-negotiation parameter into the intercept secure encryption element; and providing the intercept secure encryption element to a communications-intercept system configured to obtain intercepted messages associated with the target client device, the intercepted messages comprising session-key-negotiation messages and associated data messages encrypted with a corresponding negotiated session key, wherein the intercept secure encryption element is configured to (i) identify the negotiated session key based on the session-key-negotiation messages and the first and second key-negotiation parameters and (ii) decrypt the data messages with the negotiated session key.

46. 发明授权

US10237251B2 Communication device and system, data processing method and method for securely exchanging data 有权
公开(公告)号：US10237251B2
公开(公告)日：2019-03-19
申请号：US15911911
申请日：2018-03-05
申请人： Nagravision S.A.
发明人： Fabien Gremaud
IPC分类号： H04L29/06 , H04L9/06 , H04L9/08
摘要： The present invention relates to a method for processing data in a communication device comprising a host and a security module associated with this host. This method comprises the steps of generating, by the security module, a plurality of initial keys from an initial keys generation function, and of transmitting said plurality of initial keys to said corresponding host. For each initial key received by the host, the method comprises a step of generating a plurality of encryption keys by an extension module of said host, by using an extension function. The method further comprises the steps of receiving the data to be processed by said host and of combining said data to be processed with said encryption keys, in a combination module of said host.

47. 发明申请

US20190050605A1 FLEXIBLE CRYPTOGRAPHIC DEVICE 审中-公开
公开(公告)号：US20190050605A1
公开(公告)日：2019-02-14
申请号：US16078588
申请日：2017-04-07
申请人： NAGRAVISION S.A.
发明人： Andre KUDELSKI , Nicolas FISCHER , Jerome PERRINE
IPC分类号： G06F21/76 , G06F21/57 , G06F21/77 , G06F21/64 , G06F17/50 , H04L9/32
摘要： A method of programming a device comprising acquiring configuration data, loading the configuration data onto a programmable device, processing at least a portion of the configuration data through a one way function to form processed configuration data, and configuring at least one configurable module of the programmable device using the processed configuration data from the processing step.

48. 发明申请

US20190045254A1 Method And System To Share A Snapshot Extracted From A Video Transmission 审中-公开
公开(公告)号：US20190045254A1
公开(公告)日：2019-02-07
申请号：US16076964
申请日：2017-02-10
申请人： Nagravision S.A.
发明人： Didier HUNACEK , Olivier SCHAER , Frederic THOMAS
IPC分类号： H04N21/2743 , H04N21/4788 , H04N21/8549 , H04N21/475 , H04N21/61
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.

49. 发明授权

US10192041B2 Methods and systems for authentication using zero-knowledge code 有权
公开(公告)号：US10192041B2
公开(公告)日：2019-01-29
申请号：US14861776
申请日：2015-09-22
申请人： NAGRAVISION S.A.
发明人： Nicolas Fischer , Laurent Gauteron
IPC分类号： H04L9/32 , G06F21/00 , G06F21/31 , G06F21/36 , H04L29/06 , H04W12/06 , H04W12/08 , H04L12/911
摘要： Disclosed herein are methods and systems for authentication using zero-knowledge code. One embodiment takes the form of a process that includes detecting an accessory-access-request event associated with a trusted accessory. The process includes generating a seed sequence having a first number of seed-sequence elements. The process includes outputting an indication of at least one seed-sequence element. The process includes receiving at least one seed-sequence-element-modifier signal for at least one of the seed-sequence elements. The process includes modifying the generated seed sequence in accordance with the at least one received seed-sequence-element-modifier signal. The process includes comparing the modified seed sequence with a stored access sequence. The process includes granting operational access to the trusted accessory when the modified seed sequence matches the stored access sequence. The process includes denying operational access to the trusted accessory when the modified seed sequence does not match the stored access sequence.

50. 发明申请

US20180330098A1 METHOD TO VERIFY THE EXECUTION INTEGRITY OF AN APPLICATION IN A TARGET DEVICE 审中-公开
公开(公告)号：US20180330098A1
公开(公告)日：2018-11-15
申请号：US15774673
申请日：2016-11-17
申请人： NAGRAVISION S.A.
发明人： Brecht WYSEUR
IPC分类号： G06F21/57 , G06F21/54
CPC分类号： G06F21/577 , G06F21/54 , G06F21/57
摘要： A method to verify, by a verification server, an execution integrity of an application in a target device, comprising the steps of sending to the target device a message comprising a challenge and a first function, said first function defining an aggregation method, said challenge defining an aggregation instruction, receiving an attestation from the target device, this attestation being generated by the target device by determining for each block of the application, the corresponding digest for said block, aggregating the digests of the blocks according to the aggregation method of the first function and the challenge to produce the attestation, applying a second function to the attestation by the verification server, said second function undoing the effect of the challenge thus producing an application signature independent of the challenge, and verifying the execution integrity of the application by comparing the produced application signature with a reference signature.

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