Questions tagged [protocol]

Tor has developed several internal protocols, like the rendezvous specification, directory specification etc. This tag is for questions which deal with protocols Tor uses.

13 questions with no upvoted or accepted answers
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Detailed Understanding of Tor's connection establishment

I am really new to Onion Routing and Tor and I have just started reading about the topic on Wikipedia and the Tor Protocol Specification. Most of the concepts are explained very well but I have ...
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187 views

How do overlay network nodes communicate without IP addresses?

I've been reading about how Tor and I2P use cryptographic addresses to send messages to other nodes, but how does this work? I looked through the documentation for each and neither is very clear on ...
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117 views

What purpose does congestion control achieve, and how does it work?

I am trying to understand exactly how the different solutions for the congestion control mechanism work and what purpose they achieve. With "the solutions" I mean the circuit level throttling and the ...
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48 views

Why is the pub-key of diffie hellmann from Alice (OP) to Bob (OR) encrypted?

For building a circuit Alice contacts Bob (OR) and send her pub diffie-hellmann key encrypted with Bobs pub key. Bob sends his public-diffie-hellmann key and the session key hashed ("only" TLS ...
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59 views

SENDME cells, window threshold and last data cells

I'm writing a client in Python and trying to download the consensus. I managed to establish a single-hop connection to an authority server, send the HTTP request, and receive almost all the consensus ...
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263 views

Tor Circuit failed to be created: destroyed

Okay, so I'm running a few experiments on Tor for a course project. I keep on changing different relays to see the effects on response time. But on some of the circuits, I keep on getting this ...
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37 views

AUTH_CHALLENGE and AUTHENTICATE

Can someone explain the purpose of the AUTH_CHALLENGE command in the Tor specification? As far as I understand, responding with an AUTHENTICATE cell is optional. When would it be desirable for a node ...
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1answer
27 views

Details about Tor's Packaging Window and Delivery Window

I have learned Tor's congestion control policy from the paper: Tor:The Second-Generation Onion Router. But I don't understand Tor's Packaging Window and Delivery Window. The paper said: "The ...
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14 views

How to capture tor cells?

i have been reading in various papers that user is able to caputre tor cell packets and modify some bits or monitor them (RELAYCOMMANDBEGIN,RELAYCOMMANDDATA, RE-LAYCOMMANDEND, RELAYCOMMANDSENDME, RE-...
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29 views

How Build Tor Statically Into An Application

I have a C++ app that communicates data back and forth. I want to automatically run all connections in the program through Tor. I have it working if I already have Tor installed and set Tor as the ...
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58 views

can't connect to tor channel error

I tried to connnect to tor but i can't. Using tails os. In the onion circuit it said : ...Launched ...Launched ...Launched 10 min after I used to use tor for very long period i think that the gov ...
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44 views

Is oniontip.com dead?

When i visit oniontip it shows http://ns391359.ip-37-187-163.eu on the screen and nothing. So what happened to this site? Do they switched to better alternative? Is there any similar sites or ...
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1answer
75 views

Missing History

Most of us know of Tor V2 addresses (16 characters) and Tor V3 addresses (56 characters). What about Tor V1 addresses? What was its specification or why wasn't it used much or at all? Example: ...