ARS TECHNICA: Aaron Barr believed he had penetrated Anonymous. The loose hacker collective had been responsible for everything from anti-Scientology protests to pro-Wikileaks attacks on MasterCard and Visa, and the FBI was now after them. But matching their online identities to real-world names and locations proved daunting. Barr found a way to crack the code. In a private e-mail to a colleague at his security firm HBGary Federal, which sells digital tools to the US government, the CEO bragged about his research project. “They think I have nothing but a heirarchy based on IRC [Internet Relay Chat] aliases!” he wrote. […]