Graeme made some more updates to his .plan so I'm carrying this story up to the top of the page again.As I mentioned earlier this morning people are trying like heck to hack the Quake3 CDKey stuff. Graeme made a .plan update a little while ago on the topic giving out a few details on the key saying the chances of guessing a key are 'billions and billions to one' so there you go.

Okay. Hacker attempts with invalid keys are outnumbering real keys by a factor of 2:1 or so. Obviously this is somewhat validating the use of CD keys.
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The actual algorithm is a 64 bit DES key encryption method open to a very small window. The chances of coming up with a real valid key is in the range of billions and billions to one. A random pass through the available keys shows no sign of repeating sequences, it looks like good old chaos (in fact, statisical math proves this).

6:40 update: Graeme added this important bit of information which should make a few of you go "ooooooh" or something:

Secondly, CD keys are "leased", so if you log on through a dialup, play, then disconnect your modem and log right back on, your CD key will have to timeout on your previous IP before you can play again. This timeout period is currently set at 5 minutes.