Improve crypto

[strugee]

The crypto needs a lot of work. For example it needs forward secrecy.

Probably you should just use (something like) the Signal Protocol (previously known as Axolotl). Without having read all the docs, AFAICT the interesting part here is the routing.

[Nutomic]

Unfortunately, I discontinued this project due to lack of time. I suggest you have a look at Briar instead.