How does Backbone ensure data encryption?

Question

Backbone uses the following secure channels for communication:

In a synchronization initiated from a Cloud instance, all interaction is protected via https with TLS 1.2 (or higher).
In a synchronization initiated from a Data Center instance, you can configure the projects to communicate via HTTP(s). With the behind firewall method, you can encrypt the files and emails using PGP encryption.

You can find more information about data encryption here.