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Re: [EME] Users of "persistent-release-message" (secure proof of key release for non-persistent licenses)?

From: Bob Lund <B.Lund@CableLabs.com>
Date: Wed, 18 Mar 2015 21:19:32 +0000
To: David Dorwin <ddorwin@google.com>, "public-html-media@w3.org" <public-html-media@w3.org>
Message-ID: <D12F46C0.4E577%b.lund@cablelabs.com>

From: David Dorwin <ddorwin@google.com<mailto:ddorwin@google.com>>
Date: Wednesday, March 18, 2015 at 2:30 PM
To: "<public-html-media@w3. org>" <public-html-media@w3.org<mailto:public-html-media@w3.org>>
Subject: [EME] Users of "persistent-release-message" (secure proof of key release for non-persistent licenses)?
Resent-From: "<public-html-media@w3. org>" <public-html-media@w3.org<mailto:public-html-media@w3.org>>
Resent-Date: Wednesday, March 18, 2015 at 2:31 PM

Several of the open bugs that have been proposed for discussion at the f2f relate to "persistent-release-message<https://w3c.github.io/encrypted-media/#idl-def-MediaKeySessionType.persistent-release-message>" sessions. Other than Mark, is anyone planning to use such sessions in an application? If so, please reply with information about your use case before the telecon on March 31, to give the group time to plan for possible face-to-face discussion.

It would appear that the Limited Concurrent Streams via Key Release<https://www.w3.org/wiki/HTML/Media_Task_Force/EME_Use_Cases#Limited_Concurrent_Streams_via_Key_Release> requires the "persistent-release-message" session type. Support for this use case is important to a number of large service providers.

Note: This session type specifically relates to persisting a secure proof of key/license release for non-persistent licenses for later retrieval. It does not apply to release messages related to persistent licenses (“persistent-license<https://w3c.github.io/encrypted-media/#idl-def-MediaKeySessionType.persistent-license>” sessions) or even release messages from “temporary” sessions that do not need to be persisted.

Received on Wednesday, 18 March 2015 21:19:59 UTC

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