Online gaming and entertainment services were taken offline on April 20 after a “very sophisticated” attack on Sony’s data center in San Diego. Sony CEO Kaz Hirai said the company hadn’t been able to find any link between Anonymous and the latest attack. Anonymous members launched a denial of service attack against the PlayStation Network in protest at Sony’s legal pursuit of hacker George Hotz. The identity of the hacker or hackers behind the attack remains a mystery. Sony said there is a high possibility the hacker stole personal information on millions of registered uses, but it has found no evidence that credit card numbers were accessed.”]