Anyway, assuming you meant "downloaded file == any file", that's simple,
and already being discussed, most likely by companies like TiVo, etc.
On Wed, 2003-05-14 at 03:30, Dean McEwan wrote:
>     I had an idea for DRM, what about a kernel that forces everything downloaded to have a 
> valid signature, and doesn't let the file/program be accessed otherwise?
> 
>     We could discuss ideas now, move on to code examples next, and then draw up a whitepaper,
> 
>     All those who are interested mail me.
> 
> ---
> Dean.
> DM TECH.
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