知搜-全球专利检索

  1. 登录
  2. 注册

搜索结果

7 条记录 (耗时 0.015 秒)

    Method to enforce watermarking instructions in a receiving device
    1.
    发明授权
    Method to enforce watermarking instructions in a receiving device 有权
    在接收设备中实施水印指令的方法

    公开(公告)号：US09363482B2

    公开(公告)日：2016-06-07

    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 ,  H04N21/4405 ,  H04N21/6334 ,  H04N21/8355 ,  H04N21/8358

    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。

    Method and system to detect abnormal message transactions on a network
    3.
    发明授权
    Method and system to detect abnormal message transactions on a network 有权

    公开(公告)号：US10992694B2

    公开(公告)日：2021-04-27

    申请号：US16090141

    申请日：2017-04-10

    申请人： NAGRAVISION S.A.

    发明人： Olivier Brique ,  Patrick Servet

    IPC分类号： H04L29/06 ,  H04L12/24 ,  H04L12/26

    摘要： A surveillance system connectable to a network, comprising a communication module and a management module; said system being configured to, during an initialization phase: a. intercept a first message being sent to a first device; b. intercept a second message said second message being a response from the first device to the first message; c. calculate a time interval between the interception of the first message and the second message; d. repeat the steps a. to c. to determine further time intervals; e. determine a distribution of said time intervals; f. store the distribution and during a surveillance phase, intercept a third message said message being sent to the first device; intercept a fourth message said fourth message being a response to the third message; calculate a new time interval between the interception of the third and fourth messages; and verify that the new time interval is within the distribution.

    Method for watermarking media content and system for implementing this method
    7.
    发明授权
    Method for watermarking media content and system for implementing this method 有权
    用于实现该方法的媒体内容和系统的水印方法

    公开(公告)号：US09571899B2

    公开(公告)日：2017-02-14

    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： H04N7/167 ,  H04N21/8358 ,  H04N21/4405 ,  H04N21/6334 ,  H04N21/8355 ,  H04N21/418

    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。