[tor-talk] Tor's path security

[BM-2cUqBqHFVDHuY34ZcpL3PNgkpLUEEer8ev at bitmessage.ch]

Hello,
Please experts respond to this questions, answers will be posted on a
local blog translated:

1. Why does Tor allow to specify Guards and Exits? if you specify the
guard and exit, isn't this contrary of security and anonymity?

2. Middle nodes can't be specified in Tor's path? If No, why not, if yes
it's understandable.

3. How does Tor select a middle relay? It's totally random? How many
middle nodes will Tor use for example in 1 week of usage? They change all
the time unlike Guards?

4. Is the middle relay selection in the path process differenet when using
a Bridge than when regularly connectinh? If yes, how?

Thank you very much for your answers. Thanks Tor team for providing this
tool to the internet.