Tor has been a thorn in the side of law enforcement for years now, but new work from Wired‘s Kevin Poulsen shows the FBI has found a new way to track users across the network. Poulsen looks at the 2012 case of Aaron McGrath, who agents found hosting child pornography on a network of servers in Nebraska. Looking to expand on the bust, agents got a warrant to track anyone who visited the website at its Tor address, and infected servers with tracking malware to identify the root IP of anyone who visited the site. As a result, agents were able to track at least 25 users back to home addresses and subscriber names.
Read more at The Verge