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MediaKeySystemAccess

The MediaKeySystemAccess interface of the Encrypted Media Extensions API provides access to a Key System for decryption and/or a content protection provider. You can request an instance of this object using the Navigator.requestMediaKeySystemAccess() method.

MediaKeySystemAccess.keySystem Read only: Returns a string identifying the key system being used.

MediaKeySystemAccess.createMediaKeys(): Returns a Promise that resolves to a new MediaKeys object.
MediaKeySystemAccess.getConfiguration(): Returns an object with the supported combination of configuration options.

Specification
Encrypted Media Extensions # mediakeysystemaccess-interface

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	WebView Android	Chrome Android	Firefox for Android	Opera Android	Safari on IOS	Samsung Internet
`MediaKeySystemAccess`	42	13	38	No	29	12.1	43	42	38	29	12.2	4.0
`createMediaKeys`	42	13	38	No	29	12.1	43	42	38	29	12.2	4.0
`getConfiguration`	42	13	43 Before Firefox 50, the returned object has neither a `distinctiveIdentifier` nor a `persistentState` property.	No	29	12.1	43	42	43 Before Firefox 50, the returned object has neither a `distinctiveIdentifier` nor a `persistentState` property.	29	12.2	4.0
`keySystem`	42	13	38	No	29	12.1	43	42	38	29	12.2	4.0

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https://developer.mozilla.org/en-US/docs/Web/API/MediaKeySystemAccess