I haven’t gone through it all yet, but it looks very promising and close to my thoughts when I mentioned in a thread some time ago that SafeNet needs a completely new communication protocol
At that time I was convinced that the MaidSafe team already had a concept for such a solution, but in order to propose it, a network had to be in place first, so I thought there was no point in continuing and duplicating what had already been designed 
Now it seems that the creator of SimpleX is very close to @DIrvine expectations, I also like the concept very much, especially:
- “Full Anomination - Zero Compromise” approach, which probably solves the problem of most attacks on the network,
- a two-way communication channel
- the absence of any metadata between participants, even random numbers,
- multi-platform, including the use of Terminal in Win and Android with Termux.