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28
votes
2answers
2k views

How strong is the anonymity of a hidden service compared to an average Tor client? How much easier is it to learn the Hidden Service's IP address?

Another way of putting this: How hard would it be to de-anonymize a hidden service? By "de-anonymize" I mean revealing the IP address of whatever server the hidden service is hosted on. Of course, ...
7
votes
1answer
1k views

How do I use Tor Browser with Qubes TorVM?

I want to run Tor Browser, without the bundled Tor, using Qubes TorVM. Let's assume I have already got Qubes OS running. The TorVM documentation states under Future Work: "Create Tor Browser packages ...
16
votes
2answers
2k views

How does Tor's threat model differ from i2p's threat model?

I2P is an alternative anonymity system, with a very different design - it focuses more on intra-I2P communication, rather than communication with the wider internet. Unlike Tor, every user of I2P is ...
11
votes
3answers
1k views

How can I test an application for proxy leaks?

If I have an application that supports a SOCKS proxy, and I point it at a running Tor instance, how can I be sure that all traffic the application sends (including DNS requests) are sent through the ...
9
votes
2answers
2k views

How are 'Pluggable Transport' bundles different from 'regular' Tor Browser Bundles?

The Tor Project releases both Tor Browser Bundles, and Pluggable Transport Tor Browser Bundles. How are these different? How should I decide which bundle to use?
39
votes
6answers
6k views

Can a hidden service be hosted by multiple instances of Tor?

Is it possible for multiple Tor clients, running on different machines or even networks, to publish the same Tor hidden service using the same private key to load balance requests between them?
13
votes
2answers
693 views

How should one explain Tor to a non-technical audience?

How should I explain the operation of Tor to a reasonably-intelligent but non-technical audience? I'm looking for a way to introduce folks to Tor in a way that helps them to understand its basic ...
23
votes
2answers
4k views

How do Hidden Services get .onion domains that aren't random?

Hidden Services usually have a long-ish string of alphanumeric characters for their .onion address, and this is generated by Tor as part of the Hidden Service Configuration. How did some Hidden ...
10
votes
1answer
3k views

What are the minimum requirements for running a relay?

If I want to create a bunch of Tor relays running Linux with various VPS providers and want to save on cost, what is the minimum hardware config that I can get away with while still effectively ...
51
votes
3answers
62k views

How does Tor route DNS requests?

Tor can only handle TCP connections, but DNS is a UDP protocol. How does Tor route DNS requests over its TCP based network? Why can the same approach not be used to route all UDP traffic over Tor?
8
votes
2answers
2k views

What implementations of Tor are there?

I have seen implementations such as the Tor Browser Bundle and a TorChat, based on the Tor network. I was wondering if there were any more of them out there?
1
vote
2answers
2k views

What impact does Tor's bootstrapping process have for attack models?

As I understand it, Tor nodes and clients bootstrap themselves by contacting over the regular internet some hard-coded addresses to get basic network information. What are the effects of this design ...
21
votes
1answer
892 views

What are the implications of a Relay hosting a Hidden Service?

Are there any implications if whilst running a non-exit relay, I also use the same machine to host a Hidden Service? Specifically: How will this affect the anonymity of the Hidden Service (in terms ...
35
votes
2answers
4k views

Why does Tor Browser Bundle ship with JavaScript enabled?

Tor Browser Bundle ships with NoScript (which can disable JavaScript), but NoScript’s functionality is disabled. This means that by default in the Tor Browser Bundle, all JavaScript code is allowed to ...
34
votes
2answers
965 views

What universities / labs are researching Tor security?

Are there universities and labs that are unaffiliated with the Tor Project that are researching Tor and Onion Routing and contributing back to the Tor Project (be it in code, security audits, or just ...

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