Tor and Tails don't protect you by making you look like any random Internet user, but by making all Tor and Tails users look the same. It becomes impossible to know who is who among themall users.
Tor and Tails don't protect you by making you look like any random Internet user, but by making all Tor and Tails users look the same. It becomes impossible to know who is who among all users.
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Your Internet service provider (ISP) and local network can see that you connect to the Tor network. They stillBut, they cannot know whatich sites you visit.To alsohide that you connect to Tor,you can use a [[Tor bridge|doc/anonymous_internet/tor]].
Your Internet service provider (ISP) and local network can see that you connect to the Tornetwork. But, they cannot know which sites you visit.To also hide that you connect to Tor, use a [[Tor bridge|doc/anonymous_internet/tor]].
[[!img doc/anonymous_internet/tor/tor.svg size="600x" link="no" alt="A Tor connection goes through 3 relays with the last one establishing the actual connection to the final destination"]]
Pretend to be the destination server, a technique known as <i>machine-in-the-middle</i> attack (MitM). That is why you should pay even more attention to the security warnings in <i>Tor Browser</i>. If you get such a warning, use the [[New Identity|doc/anonymous_internet/Tor_Browser#new-identity]] feature of <i>Tor Browser</i> to change exit node.
To learn more about what information is available to someone observing the different parts of a Tor circuit, see the interactive graphics at <a href="https://support.torproject.org/https/https-1/">Tor FAQ: Can exit nodes eavesdrop on communications?</a>.
Tor exit nodes have been used in the past to collect sensitive information from unencrypted connections. Malicious exit nodes are regularly identified and removed from the Tornetwork. For an example, see <a href="https://arstechnica.com/information-technology/2007/09/security-expert-used-tor-to-collect-government-e-mail-passwords/">Ars Technica: Security expert used Tor to collect government e-mail passwords</a>.
A powerful adversary, who could analyze the timing and shape of the traffic entering and exiting the Tornetwork, might be able to deanonymize Tor users.These attacks are called <i>end-to-end correlation</i> attacks, because the attacker has to observe both ends of a Tor circuit at the same time.
End-to-end correlation attacks have been studied in research papers, but we don't know of any actual use to deanonymize Tor users. For an example, see <a href="https://www.freehaven.net/anonbib/cache/murdoch-pet2007.pdf">Murdoch and Zieliński: Sampled Traffic Analysis by Internet-Exchange-Level Adversaries</a>.