Dear Tor developers, As a PhD student in distributed systems, I am studying onion routing.
We would like to investigate an onion routing system that would run on
users devices, i.e. a lot of nodes with crappy bandwidth and
intermittent connection.
To compare against Tor, I have been looking for information about how
you currently handle the disconnection of relays, but I found no
"digest" on the Web. Your code seems to point to the direction of
core/or/circuit*, that I need to investigate further. I still would love
some first-hand high-level description from you guys.
I have the following questions:
* When an OR disconnects while supporting active circuits, how is the
failure detected?
* How are the paths subsequently rebuilt?
* To which extent would you say that Tor is resilient to churn? What
would be the effects of a massive churn of relays? Where would be
the bottleneck?
If you have any questions on my work, I will be pleased to answer
(though a little ashamed, because I know our system will never hold your
security properties so tight)!
With much respect for your work and philosophy,
Adrien Luxey
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