On Thu, 16 May 2019 at 11:20, George Kadianakis <desnac...@riseup.net> wrote:
> 3) Duration of Activity ("DoA")
>
> The USENIX paper uses the period of time during which circuits send and
> receive cells to distinguish circuit types. For example, client-side
> introduction circuits are really short lived, wheras service-side
> introduction circuits are very long lived. OTOH, rendezvous circuits
> have
> the same median lifetime as general Tor circuits which is 10 minutes.
>
> We use WTF-PAD to destroy this feature of client-side introduction
> circuits by setting a special WTF-PAD option, which keeps the circuits
> open for 10 minutes completely mimicking the DoA of general Tor
> circuits.
10 minutes exactly; or a median of 10 minutes? Wouldn't 10 minutes
exactly be a near-perfect distinguisher? And if it's a median of 10
minutes, do we know if it follows a normal distribution/what is the
shape of the distribution to mimic?
-tom
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