Re: [tor-dev] Is it possible to specify voluntary delays in my Tor client?

[David Stainton]

The Differences Between Onion Routing and Mix Networks
https://ritter.vg/blog-mix_and_onion_networks.html



On Wed, Jan 20, 2016 at 5:42 AM, Virgil Griffith  wrote:
> I understand that the original Tor model is to set low-latency and
> low-jitter as a constraint as to permit things like interactive
> web-browsing etc.  And yes, I presume Tor will always have this as a
> constraint.
>
> I am asking if:
> (1) There currently exists some way I can specify in my torrc to
> sacrifice some of these in exchange for a little greater anonymity
> protection (say I want to slowly leak a file, etc.)
>
> (2) If not, how difficult would be it to shoe-horn this into the
> current tor model?  In short, if it's not too difficult, I can look
> into finding funding it.
>
> -V
>
> On Wed, Jan 20, 2016 at 1:37 PM, grarpamp  wrote:
>> On Tue, Jan 19, 2016 at 3:03 AM, Virgil Griffith  wrote:
>>> I.e., if I want the extra resistance to traffic analysis that higher latency
>>> connections provide, is there a way to specify that in my Tor config?
>>
>> Higher latency, in and of itself, does not provide any resistance to
>> traffic analysis.
>>
>> https://en.wikipedia.org/wiki/Latency_(engineering)
>>
>> Higher global jitter might help, but circuit orientation at
>> guards and exits through to the clients seems to nullify that.
>>
>> https://en.wikipedia.org/wiki/Jitter
>>
>> For which an idea may to become packet switching, which
>> is really no longer Tor.
>>
>> https://en.wikipedia.org/wiki/Packet_switching
>>
>> Link padding seems the next real step but I've not put enough
>> reading to it, only have idea to read about. Nor do I yet review about
>> Tor padding proposal as sufficient or not, sorry.
>>
>> As it is not the Tor original model design maybe some other
>> network will take this analysis / padding issue up before then.
>> I've no idea.
>> ___
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>> https://lists.torproject.org/cgi-bin/mailman/listinfo/tor-dev
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[tor-dev] Is it possible to specify voluntary delays in my Tor client?

[Spencer]

Hi,

> 
> Yawning Angel:
> the art [of] link padding
>

I remember this:
eecs.harvard.edu/~htk/publication/2005-jit-cheng-kung-tan.pdf

Wordlife,
Spencer



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[tor-dev] Is it possible to specify voluntary delays in my Tor client?

[Spencer]

Hi,

> 
> grarpamp:
> Higher latency, in and of itself, does not 
> provide any resistance to traffic
> analysis.
> 

Increase one-way and it will become unusable; nothing to see here.

Wordlife,
Spencer



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Re: [tor-dev] Is it possible to specify voluntary delays in my Tor client?

[Yawning Angel]

On Wed, 20 Jan 2016 08:15:48 +
David Stainton  wrote:
> The Differences Between Onion Routing and Mix Networks
> https://ritter.vg/blog-mix_and_onion_networks.html

Not implemented yet in tor (see prop 254), but this is the current state
of the art in link padding as a traffic analysis defense.

http://arxiv.org/abs/1512.00524

This is follow up research from M. Juarez's GSOC project which
prototyped the framework used when writing the paper and evaluating the
various algorithms.

Regards,

-- 
Yawning Angel


pgp5P4NZJRXsk.pgp
Description: OpenPGP digital signature
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[tor-dev] Is it possible to specify voluntary delays in my Tor client?

[Virgil Griffith]

I.e., if I want the extra resistance to traffic analysis that higher
latency connections provide, is there a way to specify that in my Tor
config?


-V
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Re: [tor-dev] Is it possible to specify voluntary delays in my Tor client?

[Virgil Griffith]

I understand that the original Tor model is to set low-latency and
low-jitter as a constraint as to permit things like interactive
web-browsing etc.  And yes, I presume Tor will always have this as a
constraint.

I am asking if:
(1) There currently exists some way I can specify in my torrc to
sacrifice some of these in exchange for a little greater anonymity
protection (say I want to slowly leak a file, etc.)

(2) If not, how difficult would be it to shoe-horn this into the
current tor model?  In short, if it's not too difficult, I can look
into finding funding it.

-V

On Wed, Jan 20, 2016 at 1:37 PM, grarpamp  wrote:
> On Tue, Jan 19, 2016 at 3:03 AM, Virgil Griffith  wrote:
>> I.e., if I want the extra resistance to traffic analysis that higher latency
>> connections provide, is there a way to specify that in my Tor config?
>
> Higher latency, in and of itself, does not provide any resistance to
> traffic analysis.
>
> https://en.wikipedia.org/wiki/Latency_(engineering)
>
> Higher global jitter might help, but circuit orientation at
> guards and exits through to the clients seems to nullify that.
>
> https://en.wikipedia.org/wiki/Jitter
>
> For which an idea may to become packet switching, which
> is really no longer Tor.
>
> https://en.wikipedia.org/wiki/Packet_switching
>
> Link padding seems the next real step but I've not put enough
> reading to it, only have idea to read about. Nor do I yet review about
> Tor padding proposal as sufficient or not, sorry.
>
> As it is not the Tor original model design maybe some other
> network will take this analysis / padding issue up before then.
> I've no idea.
> ___
> tor-dev mailing list
> tor-dev@lists.torproject.org
> https://lists.torproject.org/cgi-bin/mailman/listinfo/tor-dev
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Re: [tor-dev] Is it possible to specify voluntary delays in my Tor client?

[grarpamp]

On Tue, Jan 19, 2016 at 3:03 AM, Virgil Griffith  wrote:
> I.e., if I want the extra resistance to traffic analysis that higher latency
> connections provide, is there a way to specify that in my Tor config?

Higher latency, in and of itself, does not provide any resistance to
traffic analysis.

https://en.wikipedia.org/wiki/Latency_(engineering)

Higher global jitter might help, but circuit orientation at
guards and exits through to the clients seems to nullify that.

https://en.wikipedia.org/wiki/Jitter

For which an idea may to become packet switching, which
is really no longer Tor.

https://en.wikipedia.org/wiki/Packet_switching

Link padding seems the next real step but I've not put enough
reading to it, only have idea to read about. Nor do I yet review about
Tor padding proposal as sufficient or not, sorry.

As it is not the Tor original model design maybe some other
network will take this analysis / padding issue up before then.
I've no idea.
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