And it was a bad implementation from what I understand, where what was supposed to be a randomly generated seed was actually generating the same seed over and over, and that allowed them to derive the key (or something).
It's also interesting that cracking the PS3 happened pretty quickly after Sony removed the ability to run 3rd party software.
There is a middle ground, they could conceivably revoke the key but have a whitelist for all the existing code.. Of course that can still be circumvented with a custom firmware upgrade, but flashing with custom firmware to keep your system cracked isn't something most people will do, so I could see Sony trying the whitelist path, though there's got to be enough games and packages and stuff out there to make that a nightmare.
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