The Tor financials are publicly available: https://www.torproject.org/about/financials.html.en https://www.torproject.org/about/findoc/2012-TorProject-Annual-Report.pdf As can be seen on page 8, the US government provides about 60% of the Tor Project's funding, so they don't "fully" fund it. They are a significant contributor, but if you look at the details, those agencies include the National Science Foundation, as an example, which is dedicated to funding open research. There is no conspiracy by the US government to control the Tor Project, and anyway the code is open source, reviewed by thousands of researchers and hackers, and the relays are run by independent operators in over 70 countries, so there's little the US gov could do to control the Tor network.