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Re: Identifying the type of device for DRM purposes

From: Henri Sivonen <hsivonen@iki.fi>
Date: Tue, 12 Feb 2013 18:42:52 +0200
Message-ID: <CAJQvAudYF5L94_jbtBgT57Wdv8_2EU8aeE6JDUEFM_FHr_mCAw@mail.gmail.com>
To: Andrew Livingston <Andrew.Livingston@bbc.co.uk>
Cc: Mark Watson <watsonm@netflix.com>, "<public-html-media@w3.org>" <public-html-media@w3.org>
(Quotes reordered)
On Tue, Feb 12, 2013 at 6:23 PM, Andrew Livingston
<Andrew.Livingston@bbc.co.uk> wrote:
>> From: Mark Watson [mailto:watsonm@netflix.com]
>> I can't speak for the BBC's requirements, but for our part the UA string is insufficient because it is not vouched for by the CDM or some other similarly secure component.
> That's also our position - i.e. that the user agent string is unlikely to be sufficiently trustworthy. Sorry if this was unclear.

Do you need more than the name of the operating system (as vouched for
by the CDM) to make the inferences you need to make? Or would
something less granular be sufficient (e.g. grouping operating systems
that run on at least desktops together and operating systems that run
at least on phones together and letting tablets fall into either
category depending on their lineage: Windows 8 tablets to the former
group and Android tablets to the latter group)? Or is it only a matter
of whether the system is considered to be a TV (set top box connected
to a TV) or not (e.g. Mac Mini that might be connected to a TV

Henri Sivonen
Received on Tuesday, 12 February 2013 16:43:25 UTC

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