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    • 1. 发明申请
    • SYSTEM AND METHOD TO RECORD ENCRYPTED CONTENT WITH ACCESS CONDITIONS
    • 用访问条件记录加密内容的系统和方法
    • US20130279694A1
    • 2013-10-24
    • US13990979
    • 2011-12-01
    • Fabien GremaudNicolas Fischer
    • Fabien GremaudNicolas Fischer
    • H04N7/167
    • H04N7/167H04N21/4181H04N21/4334H04N21/4408
    • A television event may be consumed after been stored in a mass memory of a multimedia unit, but still fully relies on the security of a secure device. A conversion of a received content aims at firstly descrambling the content using control words included in entitlement control messages and immediately re-encrypting the descrambled content by a unique key generated specifically for this content. Access conditions attached to the entitlement control message containing the control word are temporarily stored and once the decryption is terminated, the secure device produces an information block. This information block containing for example access conditions and an identifier of the content is either stored into a secure memory of the secure device or stored in the mass memory with the encrypted content. The unique key is made up of a combination of a root key specific to the secure device and the information block.
    • 电视事件在被存储在多媒体单元的大容量存储器中之后可能被消耗,但是仍然完全依赖于安全设备的安全性。 接收到的内容的转换旨在首先使用包括在授权控制消息中的控制字对内容进行解扰,并且通过专门针对该内容生成的唯一密钥立即重新加密解扰的内容。 临时存储附加到包含控制字的授权控制消息的访问条件,一旦解密结束,则安全设备产生信息块。 包含例如访问条件和内容的标识符的该信息块或者被存储到安全设备的安全存储器中或者存储在具有加密内容的大容量存储器中。 唯一密钥由特定于安全设备的根密钥和信息块的组合组成。
    • 2. 发明申请
    • Unit for managing audio/video data and access control method for said data
    • 用于管理音频/视频数据的单元和用于所述数据的访问控制方法
    • US20060109982A1
    • 2006-05-25
    • US11284101
    • 2005-11-22
    • Jean-Michel PuiattiAndre NicoulinNicolas FischerGuy MoreillonFabien GremaudMichael Hill
    • Jean-Michel PuiattiAndre NicoulinNicolas FischerGuy MoreillonFabien GremaudMichael Hill
    • H04N7/167
    • H04N5/913H04N7/163H04N7/1675H04N21/26613H04N21/4181H04N21/4405H04N21/4408H04N21/4627H04N21/835H04N2005/91364
    • A digital audio/video data processing unit and an access control method to this data are disclosed. The processing unit of audio/video digital data encrypted with control-words coming from control messages includes a deciphering unit of the audio/video data, a decompression unit, an input/output interface of the processed audio/video data and communication device towards a security module. The deciphering and decompression units include respectively an encryption unit and a decryption unit each having at least one personal key and a common encryption key. It includes a secured transmission device of the common key and of the control word extracted from a control message between the security module, the deciphering unit and the encryption unit using the personal key of the encryption unit. The deciphering by the deciphering unit of the audio/video data with the control word and the re-encryption by the encryption unit of said deciphered data with the common key being possible only after a successful verification of the control word and the common key. After temporary storage, the re-encrypted audio/video data cannot be decrypted by the decryption unit unless the common key has been positively verified by the security module by way of a random number generated by the decryption unit.
    • 公开了一种数字音频/视频数据处理单元和对该数据的访问控制方法。 用来自控制消息的控制字加密的音频/视频数字数据的处理单元包括音频/视频数据的解密单元,解压缩单元,经处理的音频/视频数据和通信设备的输入/输出接口朝向 安全模块 解密和解压缩单元分别包括加密单元和每个具有至少一个个人密钥和公共加密密钥的解密单元。 它包括使用加密单元的个人密钥从安全模块,解密单元和加密单元之间的控制消息中提取的公用密钥和控制字的安全传输设备。 解密单元利用所述控制字对所述音频/视频数据进行解密,并且所述解密数据的所述加密单元用所述公用密钥进行重新加密,只有在成功验证所述控制字和所述公用密钥之后才可能。 在临时存储之后,重新加密的音频/视频数据不能被解密单元解密,除非通过安全模块通过由解密单元产生的随机数来肯定地验证了公共密钥。
    • 4. 发明授权
    • System and method to record encrypted content with access conditions
    • 使用访问条件记录加密内容的系统和方法
    • US09191621B2
    • 2015-11-17
    • US13990979
    • 2011-12-01
    • Fabien GremaudNicolas Fischer
    • Fabien GremaudNicolas Fischer
    • H04N7/167H04N21/418H04N21/433H04N21/4408
    • H04N7/167H04N21/4181H04N21/4334H04N21/4408
    • A television event may be consumed after been stored in a mass memory of a multimedia unit, but still fully relies on the security of a secure device. A conversion of a received content aims at firstly descrambling the content using control words included in entitlement control messages and immediately re-encrypting the descrambled content by a unique key generated specifically for this content. Access conditions attached to the entitlement control message containing the control word are temporarily stored and once the decryption is terminated, the secure device produces an information block. This information block containing for example access conditions and an identifier of the content is either stored into a secure memory of the secure device or stored in the mass memory with the encrypted content. The unique key is made up of a combination of a root key specific to the secure device and the information block.
    • 电视事件在被存储在多媒体单元的大容量存储器中之后可能被消耗,但是仍然完全依赖于安全设备的安全性。 接收到的内容的转换旨在首先使用包括在授权控制消息中的控制字对内容进行解扰,并且通过专门针对该内容生成的唯一密钥立即重新加密解扰的内容。 临时存储附加到包含控制字的授权控制消息的访问条件,一旦解密结束,则安全设备产生信息块。 包含例如访问条件和内容的标识符的该信息块或者被存储到安全设备的安全存储器中或者存储在具有加密内容的大容量存储器中。 唯一密钥由特定于安全设备的根密钥和信息块的组合组成。