I have a quick question I hope has not been asked yet.
Let's assume there is a network such this: there is a pc (let's call it X) which is part of a wide LAN; to connect to the internet, it must go through a proxy which blocks (and logs) connections to forbidden IPs. Now, on the pc X there is Tor; it must use the proxy to work as well, but when it tries to connect the proxy blocks Tor IP; therefore it is set up with bridge relays (got by email, not the public ones). In such a way, the connection to any of the forbidden IPs is successful (the proxy doesn't block the relays IPs).
The question is: even though the PC X is reaching an IP which shouldn't be reached, since the proxy logs ALL traffic, is there a way to know from logs that the PC X is using Tor? What kind of traffic does the proxy see actually? Is the traffic encrypted or something?
Thank you in advance.