Re: Oppose DRM ! Re: CfC: to publish Encrypted Media Extensions specification as a First Public Working Draft (FPWD)

On Jan 25, 2013, at 18:57 , "Tab Atkins Jr." <jackalmage@gmail.com> wrote:

> On Fri, Jan 25, 2013 at 6:25 AM, David Singer <singer@apple.com> wrote:
>> On Jan 25, 2013, at 14:38 , Andreas Kuckartz <A.Kuckartz@ping.de> wrote:
>>> Ian Fette (イアンフェッティ):
>>>> Also, why do people insist that drm is incompatible with foss? Yes, today's
>>>> implementations are largely security through obscurity but there is nothing
>>>> that fundamentally prevents an open source drm stack if one wished to make
>>>> the investment. Create a hardware tpm and publish the specs, build some
>>>> form of attestation on top of it, etc. Clearly nontrivial but not
>>>> fundamentally impossible.
>>> 
>>> I consider it impossible to do that while keeping the software open
>>> until the opposite is proven.
>> 
>> There are uses of encrypted media which are compatible with foss.  For example, various people have realized that there are cases where media needs some amount of protection in transit, but not much, if any, protection once it reaches the end system.  DRM systems are typically quite expensive for this, as they include tamper-proofing, and TLS is expensive as it's dynamically applied (it's cheaper to pre-compute the encryption).  My read of the media extensions is that they are quite suitable to this scenario.
> 
> I don't understand.  

I'm sorry, I thought I explained that the case is for pre-computed protection in-transit (up to the moment of play, possibly).  Whether that's a minority reason to use this, I would not care to say.  Yes, you go on to discuss classic full DRM, which I don't.


David Singer
Multimedia and Software Standards, Apple Inc.

Received on Friday, 25 January 2013 18:01:52 UTC