Posted by Jeff Rife on 12/23/05 11:27

Howard (stile99@email.com) wrote in alt.video.dvd:
> You seem to be under the impression every individual disc in the world will
> have an individual key. I, however, highly doubt it.

Every DVD-Video with CSS has an individual key, so I don't see why they
wouldn't do the same thing here.

> And even if this
> were the case, then you only need to crack that key once.

I said that, and also noted that it's not very convenient. CSS has had
the master keys discovered, so it's easy to determine a disc key, because
every DVD-ROM drive in the world has the algorithm to do it...all you have
to do is feed the master key to the drive and you can play *and* CSS-
encrypted disc.

With a well-designed public key system, there are no weaknesses like this.
The only way to get the key will be to ask the master server. Sure, once
you get it, you can play that disc on any player, but *only* that disc.
And, if the system uses a combination of hardware player ID to generate
keys, then you become limited to only that player/disc combination.

--
Jeff Rife | "Five thousand dollars, huh? I'll bet we could
| afford that if we pooled our money together...
| bought a gun...robbed a bank...."
| -- Drew Carey

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