[Open-graphics] [Fwd: [OHF Board of Directors] DHCP and HDMI]

[James Richard Tyrer]

Attila Kinali wrote:
> Moin,
> 
> Without haveing read the whole discussion, a small comment
> on HDCP:
> 
> On Mon, 19 Feb 2007 18:45:46 -0700
> James Richard Tyrer <tyrerj at acm.org> wrote:
> 
>> The HDCP license rules require that digital *output* of DRM restricted
>> content higher than certain resolutions be encrypted with HDCP.
> [...]
>> The license is very restrictive, but limited to only the output issues.
>>    However, it appears to me that the OGC could easily comply with it as
>> long as all that is needed is to provide an DHCP encrypted HDMI output.
> 
> You have no idea, how restricitve the HDCP license is.
> It denies you the right to give out documentation of any
> system that can encrypt/decrypt HDCP streams to anyone
> who does not have a HDCP licnese. It even requires that
> no HDCP encryption/decryption chip is sold to any entity
> who does not have a license.
> 
> I personally don't see any way how we could comply with
> these restrictions while still be true to our original
> goal of having a completely documented graphics card.

If the encryption is done inside of a commercial chip, then the only 
issue is how to prevent sending out an unencrypted signal when this is 
not allowed.

There are probably several specific ways to accomplish this but they 
would probably all require a OTP MicroController potted on the board and 
the routing of certain PCB traces to the center layers of the PCB.

We could easily make something that was more secure than current PC 
hardware running under Windows Vista.

-- 
JRT