![]() ![]() Once the computer is successfully attacked, it secretly calls back to a FoxAcid server, which then performs additional attacks on the target computer to ensure that it remains compromised long-term, and continues to provide eavesdropping information back to the NSA. FoxAcid is an NSA system designed to act as a matchmaker between potential targets and attacks developed by the NSA, giving the agency opportunity to launch prepared attacks against their systems. ![]() On the other hand, the anonymity provided by Tor makes it impossible for the NSA to know who the user is, or whether or not the user is in the US.Īfter identifying an individual Tor user on the internet, the NSA uses its network of secret internet servers to redirect those users to another set of secret internet servers, with the codename FoxAcid, to infect the user's computer. The very feature that makes Tor a powerful anonymity service, and the fact that all Tor users look alike on the internet, makes it easy to differentiate Tor users from other web users. ![]() Last month, Brazilian TV news show Fantastico showed screenshots of an NSA tool that had the ability to identify Tor users by monitoring internet traffic. Using powerful data analysis tools with codenames such as Turbulence, Turmoil and Tumult, the NSA automatically sifts through the enormous amount of internet traffic that it sees, looking for Tor connections. These fingerprints are loaded into NSA database systems like XKeyscore, a bespoke collection and analysis tool which NSA boasts allows its analysts to see "almost everything" a target does on the internet. The NSA creates "fingerprints" that detect http requests from the Tor network to particular servers. This is done via the agency's partnership with US telecoms firms under programs codenamed Stormbrew, Fairview, Oakstar and Blarney. To accomplish this, the NSA relies on its vast capability to monitor large parts of the internet. The first step of this process is finding Tor users. The NSA refers to these capabilities as CNE, or computer network exploitation. ![]()
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