Vimeo的DRM

Digital Rights Management, or DRM, enables secure transmission of media such that no entity besides its intended recipient is able to access it meaningfully.

数字版权管理，或称DRM，使媒体的安全传输成为可能，除了预定的接收者之外，没有任何实体能够有意义地访问它。

Vimeo is in the business of providing access to video, and as we support bigger studios via our Vimeo OTT service, license holders want to exercise greater and more nuanced control over their content; bigger studios have stricter DRM requirements when they stream online. Discerning the configurable parts of DRM from the black boxes is hence paramount to ensuring seamless playback while also meaningfully protecting licensed video.

Vimeo的业务是提供视频访问，由于我们通过Vimeo OTT服务支持更大的工作室，许可证持有者希望对其内容进行更多、更细微的控制；更大的工作室在进行在线流媒体时有更严格的DRM要求。因此，将DRM的可配置部分与黑盒子区分开来，对于确保无缝播放，同时有意义地保护授权视频是至关重要的。

In its current form, the technology enabling DRM is a set of iterative updates to communication methods from the cold-war era — a combination of cryptography, information theory, and signal processing. While the implementation details are remarkably different today, the fundamental system involving encryption, decryption, and a key source continues to form its backbone.

在目前的形式下，实现DRM的技术是一套对冷战时期通信方法的反复更新--密码学、信息理论和信号处理的结合。虽然今天的实施细节有很大不同，但涉及加密、解密和密钥源的基本系统仍然是其主干。

The following schematic from a 1949 paper by Claude Shannon is a great starting point for understanding how DRM for video streaming works, and is remarkably similar to Vimeo’s DRM architecture.

以下是克劳德-香农（Claude Shannon）在1949年发表的一篇论文中的示意图，它是理解视频流DRM如何工作的一个很好的起点，而且与Vimeo的DRM架构非常相似。

Schematic from Communication Theory of Secrecy Systems (1949) by Claude Shannon (Left), Vimeo’s DRM system (Right)

克劳德-香农的《保密系统的通信理论》（1949年）示意图（左），Vimeo的DRM系统（右）。

In both cases, there are two pieces of information being transferred: the encrypted media itself, and the key. In modern DRM solutions, this distinction is important because we use different methods to transmit each securely.

在这两种情况下，有两块信息被传输：加密媒体本身和密钥。在现代DRM解决方案中，这种区分是很重要的，因为我们使用不同的方法来安全地传输每一个。

Traditional DRM technologies from the VHS and DVD era...