Re: [tor-dev] Tor HS DHT Research

[Arlo Breault <arlo@xxxxxxxxxxxxxx>]

On Mon, Mar 3, 2014 at 6:02 AM, Gareth Owen <gareth.owen@xxxxxxxxxx> wrote:

Dear all

Sorry if this is the wrong list (please tell me if it is).

I'm undertaking research into the tor HS DHT and have a couple of questions.  I know at present, a node must be on for 25 hours to participate in the DHT; however, periodically I wish to make small code changes to Tor and restart the node (aka fairly instantly/within minutes) but this causes me to lose the HSDir flag.  So my questions are:

1) Is there anyway to restart Tor without losing the HSDir flag?

2) Is uptime self reporting - e.g. is a node's self reported uptime trusted or is it obtained elsewhere - I couldn't find the answer in the code.  I guess what I'm getting at, is can I fake the uptime to get the HSDir flag?

from comment 1 in,

https://trac.torproject.org/projects/tor/ticket/8243

it seems that uptime is self-reported in the descriptor and

that the directory authorities probably shouldn't be trusting it

rather than messing with that, maybe you want to setup an

experiment with shadow

http://shadow.github.io/

and turn on

TestingTorNetwork 1

so that

MinUptimeHidServDirectoryV2 0

https://www.torproject.org/docs/tor-manual.html.en

 

Best

Gareth

---

Dr Gareth Owen
School of Computing

University of Portsmouth

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