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Re: Encrypted Media proposal: Summary of the discussion so far

From: Charles Pritchard <chuck@jumis.com>
Date: Fri, 9 Mar 2012 10:20:22 -0800
Message-Id: <4542DEF7-F18D-4075-8200-CDE5E7D0CF05@jumis.com>
Cc: Henri Sivonen <hsivonen@iki.fi>, "public-html@w3.org" <public-html@w3.org>
To: David Dorwin <ddorwin@google.com>
On Mar 9, 2012, at 10:11 AM, David Dorwin <ddorwin@google.com> wrote:

> On Fri, Mar 9, 2012 at 2:59 AM, Henri Sivonen <hsivonen@iki.fi> wrote:
> On Fri, Mar 9, 2012 at 4:16 AM, David Dorwin <ddorwin@google.com> wrote:
> > Chrome and YouTube plan to support encrypted WebM. Hopefully others will as
> > well.
> > This option is not available in the current plugin-based environment.
> 
> Are there disclosed specs / design documents explaining
>  1) how you plan to encrypt WebM
>  2) what kind of key passing messages you plan to use
>  3) if the CDM includes secrets (private key or secret algorithms),
> how you plan to share those secrets with other vendors
> ?
> 
> We're still early in the process. #1 will be handled separately by the WebM Project. #2 and #3 seem CDM-specific, so I'm not sure what you're asking.


CDM APIs are not that complex. Will someone shine a light on the basics? I mean it's just an encryption mechanism, public keys and send error messages and key requests.

I understand CDM APIs may have some goodies in them, like activating phone-home features and so on; I don't think that's what is being asked.

They're asking for the real information required for them to support existing CDMs. Some dll names and API headers.

This information may be buried behind NDA regimes; we need to dig these critical, minimal bits of information out. This information is common to all CDMs, but in typical corporate process, valuable or not, everything is marked confidential.

The vendors on this list work for the companies that produce these APIs. Surely you all can do a little bit of internal work to surface some documents to the public.

They've been requested by other developers on this list. Forcing an NDA is not going to work.

-Charles
Received on Friday, 9 March 2012 18:20:56 GMT

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