Sony Blames Anonymous for Hack Attack Group denies 'incompetent' company's allegations By Rob Quinn, Newser Staff Posted May 5, 2011 2:03 AM CDT 6 comments Comments A customer watches a monitor of Sony's videogame PlayStation 3 at a Tokyo electric shop. (Getty Images) (Newser) – The activist hacker organization Anonymous is at least partly to blame for the huge Playstation Network security breach that exposed the data of millions of customers, according to Sony. Company officials told US lawmakers that they discovered a file on one of its servers with the hacking collective's name and its "We Are Legion" tagline, reports the Los Angeles Times. Sony believes its network was breached while it defended itself from a denial-of-service attack from Anonymous, which was protesting a lawsuit brought against a Playstation hacker. "Whether those who participated in the denial-of-service attacks were conspirators or whether they were simply duped into providing cover for a very clever thief, we may never know," Sony wrote in a letter to House lawmakers. Anonymous released a statement denying the allegations. "Sony is incompetent," the group said. "While it could be the case that other Anons have acted by themselves, AnonOps was not related to this incident and takes no responsibility."