Brosix uses AES (Advanced Encryption Standard, used by US government) with 256 bit keys. Which means the encryption can’t be broken in a reasonable time.
All communication channels are direct, peer-to-peer, between the users and are not routed through Brosix servers. In some cases, if user firewalls do not allow direct connection, data is routed through Brosix servers. In these rare cases, the channels through the servers are built in a way that Brosix cannot decrypt and see the user data that flows.
To improve the security we also apply these techniques: