[Note: This comment comes from friend Steve Schear. DLH]
From: Steven Schear <firstname.lastname@example.org>
Subject: Re: [Dewayne-Net] Worried About the Privacy of Your Messages? Download Signal
Date: December 9, 2016 at 11:19:08 PM PST
Signal is GOOD but you must still trust the operators of the service and their servers which are not open source.
A BETTER way is to operate your own server (e.g., Asterisk) and connect to users only via IPv6 (ideally using cjdns https://github.com/cjdelisle/cjdns/blob/master/doc/projectGoals.md this prevents man-in-the-middle attacks.
Cjdns guarantees confidentiality, authenticity and integrity of data by using modern cryptography in a non-intrusive way. Information transmitted over a cjdns network can’t be altered or read en-route. While you can create multiple identities, it’s practically impossible to impersonate other nodes on the network and since a node’s IPv6 address is the fingerprint of its key, man-in-the-middle attacks are not possible.
Flexible and secure SIP https://en.wikipedia.org/wiki/Session_Initiation_Protocol clients supporting IPv6, such as Linphone, are cross platform.
BEST is to use direct SIP p2p IPv6 connections (no server) and cjdns.
Worried About the Privacy of Your Messages? Download Signal
By BRIAN X. CHEN
Dec 7 2016