the ps3 was designed using a beck and call method in which several algorithms r decrypted in a series which would eventually result in a key. once that key is sent back and verified by the system the game would be allowed to boot. that metldr was removed after 3.55, so obtaining the correct keys (which were changed in 3.60, 3.70, and 4.00 I believe) would require going deeper into the ps3's architecture. true blue does not use the keys of the system to verify the game signature. essentially, they have created a different security signature that bypasses the ps3's. thus, theoretically, every game should be playable with true blue. originally, the ps3 had no way to verify its own security system; as long as it said that a game, homebrew, app, etc was okay, it would boot regardless. this was changed after 3.55, which is y there is no cfw beyond that. however, several hackers have stated that the ps3 is not much more secure with newer firmware. however, because many of them r against piracy, they spend the majority of their ps3 hacking time toward allowing homebrew but not piracy. aside from certain keys, I'm not really sure how much has been changed between newer firmwares in terms of security. most hackers release very little information to avoid potential patches. that is what I understand about the system anyway.
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