Top-secret NSA documents, disclosed by whistleblower
But the documents suggest that the fundamental security of the Tor service remains intact. One top-secret presentation, titled 'Tor Stinks', states: "We will never be able to de-anonymize all Tor users all the time." It continues: "With manual analysis we can de-anonymize a very small fraction of Tor users," and says the agency has had "no success de-anonymizing a user in response" to a specific request.
Another top-secret presentation calls Tor "the king of high-secure, low-latency internet anonymity".
Tor – which stands for The Onion Router – is an open-source public project that bounces its users' internet traffic through several other computers, which it calls "relays" or "nodes", to keep it anonymous and avoid online censorship tools.
It is relied upon by journalists, activists and campaigners in the US and
Despite Tor's importance to dissidents and human rights organizations, however, the NSA and its
Privacy and human rights groups have been concerned about the security of Tor following revelations in the Guardian,
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.
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