[GTALUG] Decrypting and Re-encrypting Network Traffic

[Giles Orr]

Decrypting and re-encrypting network traffic is becoming more and more
popular.  I think it's an appalling violation of both trust and privacy,
but corporations seem to feel justified to "protect their network" (it's
not necessary to explain the logic to me, I get it ... I'm just more about
individual rights).  Or maybe they're just doing it to mine your data,
depending on the context.

There seem to be two circumstances (this is just about web traffic):
- a private computer on a shared network, ex. you take your personal
computer to a coffeeshop
- a company computer on a company network, ex. you sit down at your work
computer

I think I understand the latter: with a company computer on a company
network, all that's necessary is to push a trusted certificate and all
future communications will be done with that newly trusted cert and, well,
you're hosed.  Everything you send is examined and re-encrypted with the
receiving site's certificate at the company firewall.  Can this be
detected?  Can this be prevented?

It seems that some shared networks (ie. the coffeeshop in the above
examples) manage to do this to people: is this only possible if they
convince you to install something, and presumably that install package
includes a certificate?  Or is there another way?

-- 
Giles
https://www.gilesorr.com/
gilesorr at gmail.com
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