[tor-talk] Tor and solidarity against online harassment

[Paul Syverson]

On Sat, Dec 13, 2014 at 01:04:06PM -0700, Mirimir wrote:
[snip]
> 
> However, Tor is by design a Chaum-style network of untrusted nodes. As
> long as one of the three nodes in a circuit is honest, users remain
> anonymous. Even simultaneous attacks by non-colluding adversaries can
> protect users' anonymity. In order to avoid detection, malicious relays
> tend to behave at least somewhat like honest ones. So as long as enough
> attackers aren't colluding, they help protect users against each other.
> That is very clever.

No Tor is not a Chaum-style network. It is an onion routing network not a mix
network (See "Why I'm not an Entropist" http://www.syverson.org/entropist-final.pdf)
And in particular, it is not as secure as the security provided it its strongest,
most honest node in a circuit. End-to-end correlation works just fine even if
everything betweent eh entry and exit relasys is honest and well performing.
(See "Users Get Routed: Traffic Correlation on Tor by Realistic Adversaries"
http://www.ohmygodel.com/publications/usersrouted-ccs13.pdf.
The last comment of the paragraph is correct however.

aloha,
Paul