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index.md
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---
title: Encrypted Media Extensions API
slug: Web/API/Encrypted_Media_Extensions_API
page-type: web-api-overview
browser-compat: api.Navigator.requestMediaKeySystemAccess
---
{{DefaultAPISidebar("Encrypted Media Extensions")}} {{securecontext_header}}
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 {{domxref("Navigator.requestMediaKeySystemAccess()")}}.
## Interfaces
- {{domxref("MediaEncryptedEvent")}}
- : Represents a specific {{domxref("HTMLMediaElement/encrypted_event", "encrypted")}} event thrown when a {{domxref('HTMLMediaElement')}} encounters some initialization data.
- {{domxref("MediaKeyMessageEvent")}}
- : Contains the content and related data when the content decryption module (CDM) generates a message for the session.
- {{domxref("MediaKeys")}}
- : Represents a set of keys that an associated {{domxref('HTMLMediaElement')}} can use for decryption of media data during playback.
- {{domxref("MediaKeySession")}}
- : Represents a context for message exchange with a content decryption module (CDM).
- {{domxref("MediaKeyStatusMap")}}
- : A read-only map of media key statuses by key IDs.
- {{domxref("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
- {{domxref("HTMLMediaElement.mediaKeys")}} {{readonlyinline}}
- : Provides a {{domxref("MediaKeys")}} object that represents the set of keys that the element can use for decryption of media data during playback.
- {{domxref("HTMLMediaElement.setMediaKeys()")}}
- : Sets the {{domxref("MediaKeys")}} that will be used to decrypt media during playback.
- [`encrypted` event](/en-US/docs/Web/API/HTMLMediaElement/encrypted_event)
- : Event that is fired on a {{domxref("HTMLMediaElement")}} when initialization data is encountered in the media, indicating that it is encrypted.
#### Navigator
- {{domxref("Navigator.requestMediaKeySystemAccess()")}}
- : Returns a {{jsxref('Promise')}} that fulfils to a {{domxref('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
{{Specifications}}
## Browser compatibility
{{Compat}}