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Hide Tor use from the Internet Service Provider

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(Redirected from Hide Tor and Whonix from your ISP)



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Ambox warning pn.svg.png It is impossible to Hide Tor use from the Internet Service Provider (ISP). It has been concluded this goal is difficult beyond practicality.

See also Use of Tor Is Obvious.

The technical discussion which lead to this conclusion can be found here [archive]. The former version of this wiki page documenting some of the challenges in hiding Tor use from the ISP is still available here [archive].

As for hiding Whonix from network observers, this is a different subject which is covered on the Fingerprint page.

Technical Reasons[edit]

Using private and obfuscated bridges alone does not provide strong guarantees of hiding Tor use from the ISP. As Jacob Appelbaum has noted: [1] [2]

Some pluggable transports may seek to obfuscate traffic or to morph it. However, they do not claim to hide that you are using Tor in all cases but rather in very specific cases. An example threat model includes a DPI device with limited time to make a classification choice - so the hiding is very specific to functionality and generally does not take into account endless data retention with retroactive policing.

It is impossible to safely use a proxy to hide Tor. The connection between the user and the proxy is unencrypted and this applies to all proxies: http, https, socks4, socks4a and socks5. [3] This means the ISP can still clearly see that connections are made to the Tor network. This fact is only mentioned here because proxies are constantly (falsely) suggested as a solution whenever this topic comes up in public arenas.

Using a VPN or SSH does not provide a strong guarantee of hiding Tor use from the ISP either. [4] VPNs and SSHs are vulnerable to an attack called website traffic fingerprinting. [5]

Footnotes[edit]



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