Add encryption and authentication to peers

[interpretor]

I would like to add encryption and authentication to the peers.
It is already mentioned in the 36/ZRE draft under the paragraph "Security".
As zyre uses czmq, I would do it similar to the example in ironhouse.c and save the certs of all peers in the cert storage.
Any advice from your side?

[wesyoung]

this is how we were starting to think about it at the python level:

zeromq/pyre#94

@hintjens laid out some examples but i've not had a chance to implement yet, but have started to think about with these points in mind... there are a few spots in czmq that require touching to deal with the auth part. i had gotten it to work with the basic username/password against the gossip socket (and the peers), crypto may be a little less trivial...

https://github.com/zeromq/czmq/compare/master...wesyoung:fix/auth?expand=1

is the way i've been testing the basic auth pieces (if only to highlight what may need touching, it may not be 100% accurate but might help...). it also depends on if you're using gossip, do you want that auth protected too, etc...

[wesyoung]

i think this can be closed?

#550
#556

[bluca]

Yes - thanks!