Clear Key (or sometimes Clearkey) media encryption has been described by some in the industry as the poor man’s alternative to DRM. Nevertheless, the support of a Clear Key mechanism is a highly appropriate component of every DRM license management service. Clear Key represents is foundational layer of a streaming protocol that offers the full mechanics of media encryption and decryption for protecting audio/video content in transit, but avoids complex and proprietary delivery protections for the encryption key itself. The typical support approach is for the encryption key to be made available directly in the manifest file of the ABR stream or via a simple http/https call to a key server identified in the manifest file. This Clear Key approach was very broadly supported in the initial implementations of Apple’s HLS streaming protocol [RFC link] and became very popular because of its simplicity, although it offers very little in the way of the content security that is typically required for sophisticated commercial services as we see them today. In the context of the basic HLS protocol it is often referred to as Apple AES-128 encryption as a shorthand. MPEG-DASH adopted the mechanics of Clear Key as vendor-neutral lowest common denominator approach to enabling the Encrypted Media Extensions (EME) that protect playback of video streaming within the latest generation of browsers. Clear Key handling is required within EME support for all browsers, but it could be seen primarily as a reference mechanism, rather than a commercial rigorous security solution. Now in the form of Enhanced Clear Key Content Protection (ECCP) it can provides greater protection than TLS delivery, token authentication or Clear Key used individually. Using ECCP for DASH, HLS and CMAF, media can be encrypted with a fixed key at the server, and the key value can be signaled in the manifest file. The practical effect is to enable encryption on the server side, and decryption in the player code without the complexity of obtaining and managing a typical DRM license object.