Perhaps "hacked" is the wrong word, because it can imply both criminality and lawful exploration. But we'll stick with "hacked" here, in the sense of "some reverse engineers have figured out how you can adapt, or jailbreak, your PS3 to make it interoperable with software of your own choice."
The PS3 has been hacked before, but Sony was able to inhibit the hack with an update to its own firmware. This is much like the history of jailbreaking on Apple's iOS, where hackers typically uncover a security vulnerability and exploit it, whereupon Apple patches the hole and suppresses the jailbreak.
But the latest PS3 break is being dubbed
unpatchable and the
final hack.
That's because this hack isn't giving you an exploit to use against a programming hole. It's giving you Sony's so-called LV0 (level zero) cryptographic keys.
The PS3 system software loads up as shown in the picture below:
Read more: http://nakedsecurity.sophos.com/2012/10/25/sony-ps3-hacked-for-good-master-keys-revealed/