Lets Encrypt testing
coming in ETA: Q3 2019 ECDSA Root and Intermediates
free Cert for all website https://en.wikipedia.org/wiki/Let%27s_Encrypt
Best library for Crypto for python https://cryptography.io/en/latest/
Lets Encrypt use ACME protocol. https://en.wikipedia.org/wiki/Automated_Certificate_Management_Environment
Drawback - you need update your cert for every two month. somewhat cumbersome for non technical people