Even subsequent government studies have concluded that Tor is difficult to infiltrate, because the government would have to penetrate all three computers handling a particular message to be able to trace it back to its origin. Because the number of active Tor nodes is large, and the middle node is assigned at random, most of the node computers on a Tor network would have to be compromised for the privacy of the messages to be broken.<ref>{{cite news|url=https://www.bloomberg.com/bw/articles/2014-01-23/tor-anonymity-software-vs-dot-the-national-security-agency|title=The Inside Story of Tor, the Best Internet Anonymity Tool the Government Ever Built|date=January 23, 2014 |work=Bloomburg Business|accessdate=February 29, 2016}}</ref> | Even subsequent government studies have concluded that Tor is difficult to infiltrate, because the government would have to penetrate all three computers handling a particular message to be able to trace it back to its origin. Because the number of active Tor nodes is large, and the middle node is assigned at random, most of the node computers on a Tor network would have to be compromised for the privacy of the messages to be broken.<ref>{{cite news|url=https://www.bloomberg.com/bw/articles/2014-01-23/tor-anonymity-software-vs-dot-the-national-security-agency|title=The Inside Story of Tor, the Best Internet Anonymity Tool the Government Ever Built|date=January 23, 2014 |work=Bloomburg Business|accessdate=February 29, 2016}}</ref> |