According to Sony Online Entertainment president John Smedley, it is unlikely that the new set of cyber attacks on their servers used the data stolen in an April attack. That’s because the testing of a large amount of sign-in IDs and passwords resulted in a 0.1 percent success rate for the attackers.

“It’s just simple math,” Smedley said. “There was such a small percentage of successes. They were attacking with a large number. Because of that, the math tells us it wasn’t [Sony’s information].”

“We’ve said publicly when we were compromised before that the information is out there and could have been used. That was obviously the first thing we looked at,” he added. “Then we did the mathematical analysis and said, ‘Obviously that’s not what happened.’ I’m not going to say it’s impossible [the info came from Sony]. We just think that’s not the most likely case.”

Source: CVG {link no longer active}