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31. 发明公开

EP3293980A1 A METHOD TO CREATE A SECURE CHANNEL BETWEEN A HOST DEVICE AND AN EXTERNAL DEVICE 审中-公开
标题翻译：一种在主机设备和外部设备之间创建安全通道的方法
公开(公告)号：EP3293980A1
公开(公告)日：2018-03-14
申请号：EP16188208.9
申请日：2016-09-09
申请人： Nagravision S.A.
发明人： DESARZENS, Philippe , GREMAUD, Fabien , FISCHER, Jean-Bernard , FISCHER, Nicolas , HUNACEK, Didier
IPC分类号： H04N21/436 , H04N21/4367 , H04N21/418
CPC分类号： H04N21/4367 , H04N21/4181 , H04N21/43607
摘要： The present disclosure is in the field the access control to multimedia content by a home device, in particular the access to encrypted multimedia content.
It is proposed a method to create a secure channel between a host device and a external device, said external device being in charge of receiving encrypted multimedia content from the host device, to decrypt said multimedia content, re-encrypt it and returning it via the secure channel to the host device, said host device comprising a system on chip (SoC) comprising at least a secure execution environment and a memory, a host processing platform (HPD) comprising at least a central unit, a reception module, a video processing unit and a storage unit, said system on chip comprising a SoC private key and a SoC certificate comprising a SoC type ID, a SoC Binding unique ID and a SoC public key, said host processing platform (HPD) comprising a HPD certificate comprising a HPD type ID, the SoC binding unique ID, the SoC certificate and the HPD certificate being trusted by a common root authority, said method comprising :
- initializing a communication between the external device and the host device,
- receiving, by the external device, the SoC certificate, the Soc unique Binding ID of the Soc and the HPD certificate from the host device,
- checking the binding of the SoC cand the HPD by verifying that the HPD certificate contains the SoC Binding unique ID of the SoC,
- in response to a positive verification, creating a secure channel between the external device and the host device.
摘要翻译：本公开在本领域中是家庭设备对多媒体内容的访问控制，特别是对加密多媒体内容的访问。提出了一种在主机设备和外部设备之间创建安全通道的方法，所述外部设备负责从主机设备接收加密的多媒体内容，解密所述多媒体内容，对其进行重新加密并通过所述主机设备包括至少包括安全执行环境和存储器的片上系统（SoC），包括至少一个中央单元的主处理平台（HPD），接收模块，视频处理单元和存储单元，所述片上系统包括SoC私钥和SoC证书，所述SoC证书包括SoC类型ID，SoC绑定唯一ID和SoC公钥，所述主机处理平台（HPD）包括HPD证书，所述HPD证书包括HPD 所述SoC绑定唯一ID，所述SoC证书和所述HPD证书由公共根机构信任，所述方法包括： - 初始化所述外部设备与所述主机之间的通信设备， - 由外部设备接收SoC证书，Soc的Soc唯一绑定ID和来自主机设备的HPD证书， - 通过验证HPD证书包含SoC来检查SoC和HPD的绑定绑定SoC的唯一ID， - 为了响应肯定的验证，在外部设备和主机设备之间创建安全通道。

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