Attackers modified the popular anonymity-enabling Tor browser to track users in China and record browsing history, researchers said.

The attackers regained control of relays after Tor's oversees kicked them off, according to the research.

Technologists working on security tools outside the U.S. warn that a major change to their funding could mean catastrophe.

The attacks comes as the Tor Project is trying to enhance trust in the anonymity browser.

The accused man, Daniel Hale, worked as a Leidos contractor for the National Geospatial Intelligence Agency (NGA) from 2013-14, began communicating with the reporter in 2013 while at the NSA.

Roughly 2 million people worldwide use the Tor browser everyday. New leadership wants to turn those users into its donor base.