[tor-talk] Tor traffic statistics?

[Fabio Pietrosanti (naif)]

On 3/7/12 10:19 PM, Klaus Layer wrote:
> "Fabio Pietrosanti (naif)" <lists at infosecurity.ch> wrote on 07.03.2012:
>> - Which are the first top 20 Tor Exit Node (in terms of amount of Tor
>> Exit traffic) ?
>> - Those 20 Tor Exit Nodes, how much bandwidth does respect to the
>> overall Tor Exit traffic of the Tor Network?
>>
>> Which is the best way to get data to answer those kind of questions?
> 
> You can simply go to http://torstatus.all.de, select all exit nodes and sort 
> the result for Bandwidth. Export to CVS and download it. With this data you 
> have the top 20 exit nodes and the measured bandwidth for all exits. This data  
> should allow you to answer the questions. Please let us know the result.

Ok, i'm seeing it.

For the bandwidth the data available is "Bandwidth Kb/s".

I would like to know the historical bandwidth data that's went out of
exit-traffic "given a period of time" (for example 1 month).

And, said that "period of time" which was the total amount of bandwidth
that got trough Tor Exit Node?

Additionally, when i see "Bandwidth Kb/s" i do not see "Tor Exit
Traffic" but just "Tor Traffic" that also means:
- Relay
- Entry (for Guard nodes)

Are there Tor-Exit-Traffic-Only statistics?

I would like to provide an answer to the question:
"How much it would cost to monitor X% of Tor Exit Traffic for an enemy?"

Where X could be 70-80-90% .

Now that we have *Big Tor Exit Relay*, and almost all of them are also
Guard Nodes, the questions is:

Is it possible that by monitoring just 20 high bandwidth server (for
example) the enemy can get 70-80-90% of Tor Exit Traffic?

To be able to provide that answer we would need to have Tor Traffic
Statistics only for Tor Exit Traffic, provided within a given sample
period and compared with the Total Tor Traffic, given the same sample
period.

Anyone interested in getting in-depth with such analysis?

-naif