On 11/6/13, 5:30 PM, Owen Densmore wrote:
I think the inter-mail-server hops are encrypted, or I certainly hope
so! And the clients all support encryption or alternatively use https
web-apps.
Some providers use more lighter protocols like LMTPA (Local Mail
Transfer Protocol) for internal transfers. The idea being that if the
mail doesn't hit the internet then the physical security of the ISP is
sufficient, even though the ISP switches over to TLS security for the
delivery once the data is headed for the internet. And Google does the
latter. But for Google their internal network is world spanning, and
delegated off to other companies fiber infrastructure. Question is,
does Google have a fastpath for gmail-to-gmail deliveries that does not
use any encryption? According to the leaked slides, the NSA was busy
deconstructing the Google and Yahoo internal protocols, so they must
have thought it would be profitable. (And Google engineers say that the
slides indeed reveal proprietary information.)
Marcus
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