Security: HTTPS, WSS, PFS and E2EE with Phoenix framework

Ok, thx - here I will summarize all info:

  1. HTTPS, WSS protocols are configurable
  2. WSS is already provided in above protocols
  3. PFS is configurable too and need more attention (ciphers, SSL version)

Mozilla wiki article describes SSL configuration and splits it by client support.
SSL configuration could be set in standard nginx way or in cowboy/phoenix configuration.