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Of course, those of us who value our privacy play there too, but that's neither here nor there...
Anyway, although the NSA and GCHQ have some proof of concepts, they have yet to actually hack it according to Snowden!
According to the Guardian’s James Ball, Bruce Schneier and Glenn Greenwald, the NSA’s “current successes against Tor rely on identifying users and then attacking vulnerable software on their computer.”So they haven't hacked Tor, but they have found ways to exploit user's computers rather than the Tor network itself. We actually knew that back in August when we learned that there was a vulnerability in the Windows version of the Tor Browser Bundle. Linux and Mac versions were uneffected though.
“While it seems that the NSA has not compromised the core security of the Tor software or network, the documents detail proof-of-concept attacks, including several relying on the large-scale online surveillance systems maintained by the NSA and GCHQ through internet cable taps,” the writers add.
The Guardian has so far published three top-secret government slideshows used to discuss the Tor network and possible vulnerabilities that might compromise users if properly exploited.
Also, don't forget that Tor is built into Bauer-Puntu Linux!