Comment Re:Wow... (Score 1) 534
For two signatures in the future, with truly random values of m, you won't be able to derive the private key, but the key has already been discovered. The cat's out of the bag now... you can't put it back in.
The only way for Sony to prevent this is to revoke the signing (private) key in a system update, which would make GAMES NOT WORK. Any convoluted solution involving whitelists—like some mentioned above in this thread—don't work, because you can trivially create your own whitelist now, and sign it with Sony's actual signing key.