Encrypted Media Extensions API

Secure context

The Encrypted Media Extensions API provides interfaces for controlling the playback of content which is subject to a digital restrictions management scheme.

Access to this API is provided through requestMediaKeySystemAccess().

Interfaces

• MediaEncryptedEvent
  • : Represents a specific encrypted event thrown when a HTMLMediaElement encounters some initialization data.
• MediaKeyMessageEvent
  • : Contains the content and related data when the content decryption module (CDM) generates a message for the session.
• MediaKeys
  • : Represents a set of keys that an associated HTMLMediaElement can use for decryption of media data during playback.
• MediaKeySession
  • : Represents a context for message exchange with a content decryption module (CDM).
• MediaKeyStatusMap
  • : A read-only map of media key statuses by key IDs.
• MediaKeySystemAccess
  • : Provides access to a key system for decryption and/or a content protection provider.

Extensions to other interfaces

The Encrypted Media Extensions API extends the following APIs, adding the listed features.

HTMLMediaElement

• mediaKeys Read only
  • : Provides a MediaKeys object that represents the set of keys that the element can use for decryption of media data during playback.
• setMediaKeys()
  • : Sets the MediaKeys that will be used to decrypt media during playback.
• encrypted event
  • : Event that is fired on a HTMLMediaElement when initialization data is encountered in the media, indicating that it is encrypted.

Navigator

• requestMediaKeySystemAccess()
  • : Returns a Promise that fulfils to a MediaKeySystemAccess object that can be used to access a particular media key system, which can in turn be used to create keys for decrypting a media stream.

Specifications

Browser compatibility