Quote:But the nightmare scenario would be if the attackers used Sony’s exposed root key to sign a back-doored firmware image or other low-level software update. If they then compromised the PSN update servers they could use them to deliver the malicious update to everyone through the normal trusted channel.

Wikipedia reports 50 million PlayStation 3 units and 70 million PlayStation Notwork users, suggesting that a large percentage of these units are given internet connectivity on an ongoing basis. This attacker could potentially have created overnight the largest botnet in the world by a very large margin.