CoAp, MQTT Question on Encryption

Tutorials & Examples
1

I am looking at the Atmel ECDH/ECC to provide Encryption of plan text Authentication of COAP and MQTT using either the ESP8266 or Nrf24l01. Anyone have any experiance?

2

I’ve set up MQTT certificate TLS encryption with this tutorial:

http://owntracks.org/booklet/guide/broker/#raspi

(although I don’t use owntracks)