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    WATERMARKING MULTIMEDIA FRAGMENTS INTO TWO OR MORE VARIANTS
    1.
    发明公开
    WATERMARKING MULTIMEDIA FRAGMENTS INTO TWO OR MORE VARIANTS 审中-公开

    公开(公告)号：US20240236444A9

    公开(公告)日：2024-07-11

    申请号：US18544544

    申请日：2023-12-19

    申请人： Nagravision S.A.

    发明人： Jacobus PANIS

    IPC分类号： H04N21/8358 ,  H04N21/845

    CPC分类号： H04N21/8358 ,  H04N21/8456 ,  H04N21/47202

    摘要： A method of processing a multimedia fragment into two or more variants of the multimedia fragment, each variant having a different watermark, the method comprising: fragmenting a multimedia content into a sequence of fragments; watermarking a plurality of the fragments to create two or more variants of each of the plurality of fragments, wherein the two or more variants of one fragment are watermarked using different watermarks; adjusting the length of the two or more variants for at least one of the fragments to a same adjusted length, wherein the adjusted length is indicative of a temporal position of the two or more variants of the at least one of the fragments compared to variants of other fragments in the sequence of fragments.

    Method and device to protect a cryptographic exponent
    2.
    发明授权
    Method and device to protect a cryptographic exponent 有权

    公开(公告)号：US12034838B2

    公开(公告)日：2024-07-09

    申请号：US16095737

    申请日：2017-05-18

    申请人： NAGRAVISION S.A.

    发明人： Marco Macchetti ,  Karine Villegas

    IPC分类号： H04L9/08 ,  H04L9/30

    CPC分类号： H04L9/0833 ,  H04L9/0869 ,  H04L9/3013 ,  H04L2209/046

    摘要： Public-key cryptography allows putting into practice concepts of digital signatures and public-key key exchange; methods used on a daily basis in digital systems. A method generates a protected secret value k′ used as a first operand in a cryptographic group operation involving a base group element G of order n and including: generating random positive integers k1 and k2, that are strictly smaller than the order of the group element G due to a cryptographically secure random number generator, such that the generated random positive integers k1 and k2 do not share any divisor with the order n other than 1; generating the protected secret value k′ based on the generating random positive integers such as k′=k1*k2, the protected secret value k′ being used as a second operand in the group operation.

    Secured home network
    4.
    发明授权
    Secured home network 有权

    公开(公告)号：US11838315B2

    公开(公告)日：2023-12-05

    申请号：US17894276

    申请日：2022-08-24

    申请人： NAGRAVISION S.A.

    发明人： Philippe Stransky-Heilkron

    IPC分类号： H04L29/00 ,  H04L9/40 ,  H04W12/128 ,  H04W12/12

    CPC分类号： H04L63/145 ,  H04L63/1416 ,  H04W12/12 ,  H04W12/128

    摘要： Malware detection logic executed by a secured device residing in a home network may receive a message from an unsecured device of a first unsecured network and intended for a destination device of the home network, the destination device comprising a security client. The malware detection logic may establish a secure communication channel between the malware detection logic of the secured device and the security client of the destination device. The malware detection logic may execute a validation test on the message to determine that the message includes malware. The malware detection logic may report an alarm to the security client of the destination device. The malware detection logic may transmit information related to the malware to a cloud computing server. The malware detection logic may prevent an application associated with the destination device from processing the message.

    TESTING RENDERING OF SCREEN OBJECTS
    5.
    发明公开
    TESTING RENDERING OF SCREEN OBJECTS 审中-公开

    公开(公告)号：US20230353814A1

    公开(公告)日：2023-11-02

    申请号：US18193947

    申请日：2023-03-31

    申请人： Nagravision S.A.

    发明人： Douglas Gore ,  Ping Zou

    IPC分类号： H04N21/43 ,  H04N17/04 ,  H04N21/2187 ,  H04N21/84

    CPC分类号： H04N21/43074 ,  H04N17/04 ,  H04N21/2187 ,  H04N21/84 ,  H04N2017/008

    摘要： The present disclosure relates to methods and devices for testing video data being rendered at or using a media device. A plurality of video frames to be rendered is received, each frame comprising one or more primary screen objects and at least one further screen object. The received frames are rendered at or using the media device wherein the at least one further screen object is superimposed on the one or more primary screen objects of a given frame during rendering. The rendered frames are provided to a data model. Extracted metadata indicating the presence or absence of further screen objects in the rendered video frames is the output of the data model. The data model is also provided with original metadata associated with the video frames prior to rendering. The rendering of each further screen object is then tested based on the original metadata and extracted metadata relating to a given video frame. The disclosure also extends to associated methods and devices for generating training data for testing rendering of video frame and training a data model using the training data.

    METHOD TO TRANSMIT MESSAGES BETWEEN A DEVICE AND A REMOTER SERVER
    8.
    发明公开
    METHOD TO TRANSMIT MESSAGES BETWEEN A DEVICE AND A REMOTER SERVER 审中-公开

    公开(公告)号：US20230283673A1

    公开(公告)日：2023-09-07

    申请号：US18170312

    申请日：2023-02-16

    申请人： NAGRAVISION S.A.

    发明人： Andre KUDELSKI

    IPC分类号： H04L67/141 ,  H04W4/80 ,  H04L67/1034 ,  H04L51/48

    CPC分类号： H04L67/141 ,  H04W4/80 ,  H04L67/1034 ,  H04L51/48

    摘要： In order to allow an access to the Internet, and therefore to a remote server, for a device having no connection with an Internet gateway, there is proposed a method to transmit a message from a first device to a remote server, the first device having no connection with the remote server, said method comprising:



    detecting a second device by the first device,
    establishing a communication channel between the first and the second device,
    transferring the message from the first to the second device, said message comprising an address of the remote server,
    transferring, by the second device, the message to the remote server using the remote server address contained in the message.

    System and method for controlling operation of consumption appliances
    9.
    发明授权
    System and method for controlling operation of consumption appliances 有权

    公开(公告)号：US11710971B2

    公开(公告)日：2023-07-25

    申请号：US17523324

    申请日：2021-11-10

    申请人： Nagravision S.A.

    发明人： Antoine Burckard

    IPC分类号： G05D3/12 ,  G05D5/00 ,  G05D9/00 ,  G05D11/00 ,  G05D17/00 ,  H02J4/00 ,  H04L12/28

    CPC分类号： H02J4/00 ,  H04L12/282 ,  H04L12/2827

    摘要： A method is disclosed for controlling the operating of a consumption appliance by way of a selector switch controlled by an energy saving device connected to a management center. The consumption appliance is kept in its default power mode, until receiving, by the energy saving device, an authentic secured control message sent by the management center. This message includes a command onto the mode in which the consumption appliance has to be switched. A counter is initialized with an initialization value before to be triggered. The consumption appliance is switched in the mode indicated by the command, either until the counter has reached a threshold value, or until receiving another authentic control message. If the counter has reached the threshold value, then the consumption appliance is switched in its default power mode. If another authentic secured control message has been received, then returning to the step of initializing the counter.