Abstract

This specification defines the "keyids" Initialization Data format for use with the Encrypted Media Extensions [ENCRYPTED-MEDIA].

Note

It defines a stream format-independent format for specifying a list of key ID(s). This type can be used by applications to directly provide information necessary to generate a license request without using media data or constructing container-specific formats.

Status of This Document

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1. Format

The format is a JSON object, encoded in UTF-8 as specified in the Encoding specification [encoding], containing the following member:

"kids"
An array of key ID(s). Each element of the array is the base64url encoding of the octet sequence containing the key ID value.
Note

See Using base64url.

Note

Applications may encode the JSON string using the TextEncoder interface [encoding]

2. Example

This section is non-normative.

The following example will generate a license request for two key ID(s). (Line breaks are for readability only.)

Example 1
{
  "kids":
    [
     "LwVHf8JLtPrv2GUXFW2v_A",
     "0DdtU9od-Bh5L3xbv0Xf_A"
    ],
}

A. References

A.1 Normative references

[ENCRYPTED-MEDIA]
David Dorwin; Jerry Smith; Mark Watson; Adrian Bateman. W3C. Encrypted Media Extensions. 21 April 2016. W3C Working Draft. URL: http://www.w3.org/TR/encrypted-media/
[encoding]
Anne van Kesteren; Joshua Bell; Addison Phillips. W3C. Encoding. 20 October 2015. W3C Candidate Recommendation. URL: http://www.w3.org/TR/encoding/