The Tor browser is the subject of a code Cold War between the US and Russia, with the former investing in its development, while the other is offering a bounty to anyone who can break it.
Financial information released by the Tor Project shows that the US government has put $1.8m into the secure browser company through a range of third parties.
According to the Guardian newspaper these third parties provide "pass-through" grants to the project, even while the National Security Agency works towards cracking Tor and other similar secure systems.
The paper added that in the past two years, during which we have seen the revelations of Edward Snowden, government investment has actually increased.
The papers released by the Tor project (PDF) show that it is not all indirect government investment, and reveals that the official National Science Foundation and Department of State have put in a combined $350,000.
While Tor enjoys official support in the US the same cannot be said of Russia, where an official bounty has been offered for a crack.
A tender document released this month shows the government offering 3.9 million roubles, around $111,000 or £65,000, to anyone who can produce a system for finding data on those using Tor.
Use of the anonymising browser in Russia has shot up from 80,000 to 200,000 in the last month alone.
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