If It Wanted, Google Could Deanonymize a Large Number of Tor Connections

A team of scientists has come up with a new attack method that in the hands of certain adversaries can be used to deanonymize Tor traffic by monitoring the traffic that goes into a Tor relay and the HTTP and DNS traffic that comes out of a Tor exit node.

Called DefecTor, this new attack is an improved version of what security and privacy experts call a “Tor correlation attack.”